diff --git a/DEVLOG.md b/DEVLOG.md
index 640bcd5..03296b3 100644
--- a/DEVLOG.md
+++ b/DEVLOG.md
@@ -2,6 +2,47 @@
 
 Este documento sirve para llevar un control diario del desarrollo, decisiones técnicas y nuevas funcionalidades implementadas en el proyecto.
 
+## [2025-12-29] - Sistema Avanzado de Mapeo de Tiles
+
+### Funcionalidades Implementadas
+- **TileDefinitions.js:** Nuevo módulo centralizado con definiciones de todas las tiles (rooms, corridors, L-shapes, T-junctions).
+  - Cada tile incluye: dimensiones, tipo, imagen, matriz de walkability, y exits.
+  - Matriz de walkability: 0 = no pisable, 1-8 = pisable con capa/altura, 9 = escaleras.
+  
+- **Sistema de Deck Abstracto:**
+  - El deck ahora contiene tipos abstractos (e.g., 'L', 'corridor') en lugar de tiles específicas.
+  - Composición: 8 rooms 4x4, 4 rooms 4x6, 12 corridors, 10 L-shapes, 8 T-junctions.
+  - Cuando se dibuja un tipo, el sistema selecciona aleatoriamente entre las variantes que encajan.
+
+- **Validación de Conexiones:**
+  - `canConnectTiles()`: Verifica compatibilidad de tipos, dirección de salidas, y alineación de walkability.
+  - Reglas de conexión: Rooms ↔ Rooms/Corridors, Corridors ↔ Rooms/Corridors/L/T, L/T ↔ Corridors.
+  - Validación de dirección: Si sales por N, la nueva tile debe tener salida S.
+
+- **Alineación de Walkability:**
+  - `validateWalkabilityAlignment()`: Maneja tiles de diferentes tamaños (corridor 2x6 vs room 4x4).
+  - Prueba offset 0 primero, luego offset 2 (ancho del corridor) si es necesario.
+  - Sistema de offset para desplazar L-shapes y T-junctions y alinear áreas pisables.
+
+- **Filtrado de Orientación:**
+  - Corridors se filtran por orientación: puertas E/W requieren corridors EW, puertas N/S requieren corridors NS.
+  - Selección exhaustiva: Cuando se dibuja una L o T, se prueban todas las variantes antes de descartar.
+
+### Cambios Técnicos
+- Modificado `DungeonDecks.js` para usar sistema de deck abstracto.
+- Actualizado `exploreRoom()` en `main.js` para trabajar con tipos abstractos y seleccionar variantes concretas.
+- Nuevas funciones: `validateWalkabilityAlignment()`, `canConnectTiles()`, `getEdgeCells()`, `shouldPlaceDoor()`.
+- Actualizado `renderRoom()` para usar `room.tileDef` en lugar de `ASSETS.tiles`.
+
+### Problemas Conocidos
+- **Offset de L/T:** La alineación de L-shapes y T-junctions todavía presenta desplazamientos incorrectos en algunos casos.
+- **Frecuencia de L/T:** Aunque se aumentó la cantidad en el deck, las L y T solo aparecen cuando se conectan desde corridors, limitando su frecuencia.
+
+### Próximos Pasos
+- Depurar y corregir el cálculo del offset para L-shapes y T-junctions.
+- Revisar la lógica de aplicación del offset según la dirección de conexión (N/S vs E/W).
+- Considerar ajustar las reglas de conexión para permitir más variedad en la generación.
+
 ## [2025-12-28] - Fase 1: Arquitectura Híbrida y Servidor
 
 ### Infraestructura
diff --git a/assets/images/dungeons/L_NE.png b/assets/images/dungeons/L_NE.png
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diff --git a/assets/images/dungeons/L_WN.png b/assets/images/dungeons/L_WN.png
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diff --git a/assets/images/dungeons/T_NES.png b/assets/images/dungeons/T_NES.png
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diff --git a/assets/images/dungeons/T_WNE.png b/assets/images/dungeons/T_WNE.png
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diff --git a/assets/images/dungeons/corridor1_EW.png b/assets/images/dungeons/corridor1_EW.png
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diff --git a/assets/images/dungeons/corridor2_EW.png b/assets/images/dungeons/corridor2_EW.png
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diff --git a/assets/images/dungeons/corridor3_EW.png b/assets/images/dungeons/corridor3_EW.png
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diff --git a/assets/images/dungeons/room_4x4_circle.png b/assets/images/dungeons/room_4x4_circle.png
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diff --git a/assets/images/dungeons/room_4x4_normal.png b/assets/images/dungeons/room_4x4_normal.png
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diff --git a/assets/images/dungeons/room_4x4_squeleton.png b/assets/images/dungeons/room_4x4_squeleton.png
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index 0000000..91f7acd
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diff --git a/assets/images/dungeons/room_4x6_altar.png b/assets/images/dungeons/room_4x6_altar.png
new file mode 100644
index 0000000..37a69f6
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diff --git a/assets/images/dungeons/room_4x6_tomb.png b/assets/images/dungeons/room_4x6_tomb.png
new file mode 100644
index 0000000..80f1e86
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diff --git a/src/dungeon/DungeonDecks.js b/src/dungeon/DungeonDecks.js
index dd44138..9190a9e 100644
--- a/src/dungeon/DungeonDecks.js
+++ b/src/dungeon/DungeonDecks.js
@@ -1,9 +1,11 @@
-const ROOM_CARDS = [
-    { type: 'tile_4x8', width: 4, height: 8, exits: ['N', 'S'], name: "Pasillo Largo" },
-    { type: 'tile_base', width: 4, height: 4, exits: ['N', 'E', 'W'], name: "Sala Pequeña" },
-    { type: 'tile_base', width: 4, height: 4, exits: ['N', 'S', 'E', 'W'], name: "Intersección" },
-    { type: 'tile_8x4', width: 8, height: 4, exits: ['N', 'S'], name: "Sala Ancha" }
-];
+import { ROOMS, CORRIDORS, L_SHAPES, T_JUNCTIONS } from './TileDefinitions.js';
+
+/**
+ * DungeonDeck - Manages the deck of dungeon tiles
+ * 
+ * New approach: Deck contains abstract tile types, not specific tiles
+ * When a type is drawn, we select a fitting variant from available options
+ */
 
 export class DungeonDeck {
     constructor() {
@@ -13,10 +15,59 @@ export class DungeonDeck {
     }
 
     shuffleDeck() {
-        // Create a new deck with multiple copies of cards
+        // Create a deck with abstract tile types
         this.deck = [
-            ...ROOM_CARDS, ...ROOM_CARDS, ...ROOM_CARDS, // 3 copies of each
-            { type: 'tile_8x8', width: 8, height: 8, exits: ['N'], name: "Sala del Tesoro" } // 1 Objective Room
+            // 8 rooms 4x4 (abstract)
+            { type: 'room_4x4' },
+            { type: 'room_4x4' },
+            { type: 'room_4x4' },
+            { type: 'room_4x4' },
+            { type: 'room_4x4' },
+            { type: 'room_4x4' },
+            { type: 'room_4x4' },
+            { type: 'room_4x4' },
+
+            // 4 rooms 4x6 (abstract)
+            { type: 'room_4x6' },
+            { type: 'room_4x6' },
+            { type: 'room_4x6' },
+            { type: 'room_4x6' },
+
+            // 12 corridors (abstract)
+            { type: 'corridor' },
+            { type: 'corridor' },
+            { type: 'corridor' },
+            { type: 'corridor' },
+            { type: 'corridor' },
+            { type: 'corridor' },
+            { type: 'corridor' },
+            { type: 'corridor' },
+            { type: 'corridor' },
+            { type: 'corridor' },
+            { type: 'corridor' },
+            { type: 'corridor' },
+
+            // 10 L-shapes (abstract) - increased from 6
+            { type: 'L' },
+            { type: 'L' },
+            { type: 'L' },
+            { type: 'L' },
+            { type: 'L' },
+            { type: 'L' },
+            { type: 'L' },
+            { type: 'L' },
+            { type: 'L' },
+            { type: 'L' },
+
+            // 8 T-junctions (abstract) - increased from 4
+            { type: 'T' },
+            { type: 'T' },
+            { type: 'T' },
+            { type: 'T' },
+            { type: 'T' },
+            { type: 'T' },
+            { type: 'T' },
+            { type: 'T' }
         ];
 
         // Fisher-Yates shuffle
@@ -43,6 +94,48 @@ export class DungeonDeck {
         this.discardPile.push(card);
         return card;
     }
+
+    /**
+     * Draw a compatible abstract tile type
+     * @param {string} originTileType - Type of the origin tile ('room', 'corridor', 'L', 'T')
+     * @param {number} maxAttempts - Maximum number of cards to try
+     * @returns {object|null} - Abstract tile card or null if none found
+     */
+    drawCompatibleCard(originTileType, maxAttempts = 10) {
+        const validTypes = this.getCompatibleTypes(originTileType);
+
+        for (let i = 0; i < maxAttempts && this.deck.length > 0; i++) {
+            const card = this.drawCard();
+
+            // Check if this abstract type is compatible
+            if (validTypes.includes(card.type)) {
+                return card;
+            }
+
+            // Put incompatible card back at the bottom of the deck
+            this.deck.unshift(card);
+            this.discardPile.pop();
+        }
+
+        console.warn(`Could not find compatible tile for ${originTileType} after ${maxAttempts} attempts`);
+        return null;
+    }
+
+    /**
+     * Get compatible tile types for a given origin type
+     * @param {string} originType - Type of the origin tile
+     * @returns {string[]} - Array of compatible abstract tile types
+     */
+    getCompatibleTypes(originType) {
+        const connectionRules = {
+            'room': ['room_4x4', 'room_4x6', 'corridor'],
+            'corridor': ['room_4x4', 'room_4x6', 'corridor', 'L', 'T'],
+            'L': ['corridor'],
+            'T': ['corridor']
+        };
+
+        return connectionRules[originType] || [];
+    }
 }
 
 export const dungeonDeck = new DungeonDeck();
diff --git a/src/dungeon/TileDefinitions.js b/src/dungeon/TileDefinitions.js
new file mode 100644
index 0000000..95eef71
--- /dev/null
+++ b/src/dungeon/TileDefinitions.js
@@ -0,0 +1,431 @@
+/**
+ * TileDefinitions.js
+ * 
+ * Defines all dungeon tiles with their properties:
+ * - Dimensions (width x height in cells)
+ * - Walkability matrix (0 = not walkable, 1-8 = walkable layer/height, 9 = stairs)
+ * - Tile type (room, corridor, L, T)
+ * - Exit points
+ * - Image path
+ */
+
+// ============================================================================
+// ROOMS (4x4 and 4x6)
+// ============================================================================
+
+const ROOM_4X4_NORMAL = {
+    id: 'room_4x4_normal',
+    tileType: 'room',
+    width: 4,
+    height: 4,
+    image: '/assets/images/dungeons/room_4x4_normal.png',
+    walkability: [
+        [1, 1, 1, 1],
+        [1, 1, 1, 1],
+        [1, 1, 1, 1],
+        [1, 1, 1, 1]
+    ],
+    exits: ['N', 'S', 'E', 'W']
+};
+
+const ROOM_4X4_CIRCLE = {
+    id: 'room_4x4_circle',
+    tileType: 'room',
+    width: 4,
+    height: 4,
+    image: '/assets/images/dungeons/room_4x4_circle.png',
+    walkability: [
+        [1, 1, 1, 1],
+        [1, 1, 1, 1],
+        [1, 1, 1, 1],
+        [1, 1, 1, 1]
+    ],
+    exits: ['N', 'S', 'E', 'W']
+};
+
+const ROOM_4X4_SKELETON = {
+    id: 'room_4x4_skeleton',
+    tileType: 'room',
+    width: 4,
+    height: 4,
+    image: '/assets/images/dungeons/room_4x4_squeleton.png',
+    walkability: [
+        [1, 1, 1, 1],
+        [1, 1, 1, 1],
+        [1, 1, 1, 1],
+        [1, 1, 1, 1]
+    ],
+    exits: ['N', 'S', 'E', 'W']
+};
+
+const ROOM_4X6_ALTAR = {
+    id: 'room_4x6_altar',
+    tileType: 'room',
+    width: 4,
+    height: 6,
+    image: '/assets/images/dungeons/room_4x6_altar.png',
+    walkability: [
+        [1, 1, 1, 1],
+        [1, 1, 1, 1],
+        [1, 1, 1, 1],
+        [1, 1, 1, 1],
+        [1, 1, 1, 1],
+        [1, 1, 1, 1]
+    ],
+    exits: ['N', 'S', 'E', 'W']
+};
+
+const ROOM_4X6_TOMB = {
+    id: 'room_4x6_tomb',
+    tileType: 'room',
+    width: 4,
+    height: 6,
+    image: '/assets/images/dungeons/room_4x6_tomb.png',
+    walkability: [
+        [1, 1, 1, 1],
+        [1, 1, 1, 1],
+        [1, 1, 1, 1],
+        [1, 1, 1, 1],
+        [1, 1, 1, 1],
+        [1, 1, 1, 1]
+    ],
+    exits: ['N', 'S', 'E', 'W']
+};
+
+// Example room with stairs (2 levels)
+const ROOM_4X6_STAIRS = {
+    id: 'room_4x6_stairs',
+    tileType: 'room',
+    width: 4,
+    height: 6,
+    image: '/assets/images/dungeons/room_4x6_altar.png', // Using altar image as placeholder
+    walkability: [
+        [1, 1, 1, 1],
+        [1, 1, 1, 1],
+        [1, 9, 9, 1],  // Stairs connecting level 1 and 2
+        [1, 2, 2, 1],
+        [2, 2, 2, 2],
+        [2, 2, 2, 2]
+    ],
+    exits: ['N', 'S']
+};
+
+// ============================================================================
+// L-SHAPES (4x4 with 2-tile rows)
+// ============================================================================
+
+const L_NE = {
+    id: 'L_NE',
+    tileType: 'L',
+    width: 4,
+    height: 4,
+    image: '/assets/images/dungeons/L_NE.png',
+    walkability: [
+        [1, 1, 0, 0],
+        [1, 1, 0, 0],
+        [1, 1, 1, 1],
+        [1, 1, 1, 1]
+    ],
+    exits: ['N', 'E']
+};
+
+const L_SE = {
+    id: 'L_SE',
+    tileType: 'L',
+    width: 4,
+    height: 4,
+    image: '/assets/images/dungeons/L_SE.png',
+    walkability: [
+        [1, 1, 1, 1],
+        [1, 1, 1, 1],
+        [1, 1, 0, 0],
+        [1, 1, 0, 0]
+    ],
+    exits: ['S', 'E']
+};
+
+const L_WS = {
+    id: 'L_WS',
+    tileType: 'L',
+    width: 4,
+    height: 4,
+    image: '/assets/images/dungeons/L_WS.png',
+    walkability: [
+        [1, 1, 1, 1],
+        [1, 1, 1, 1],
+        [0, 0, 1, 1],
+        [0, 0, 1, 1]
+    ],
+    exits: ['W', 'S']
+};
+
+const L_WN = {
+    id: 'L_WN',
+    tileType: 'L',
+    width: 4,
+    height: 4,
+    image: '/assets/images/dungeons/L_WN.png',
+    walkability: [
+        [0, 0, 1, 1],
+        [0, 0, 1, 1],
+        [1, 1, 1, 1],
+        [1, 1, 1, 1]
+    ],
+    exits: ['W', 'N']
+};
+
+// ============================================================================
+// T-JUNCTIONS (4x6 or 6x4 with 2-tile rows)
+// ============================================================================
+
+const T_NES = {
+    id: 'T_NES',
+    tileType: 'T',
+    width: 4,
+    height: 6,
+    image: '/assets/images/dungeons/T_NES.png',
+    walkability: [
+        [1, 1, 0, 0],
+        [1, 1, 0, 0],
+        [1, 1, 1, 1],
+        [1, 1, 1, 1],
+        [1, 1, 0, 0],
+        [1, 1, 0, 0]
+    ],
+    exits: ['N', 'E', 'S']
+};
+
+const T_WNE = {
+    id: 'T_WNE',
+    tileType: 'T',
+    width: 6,
+    height: 4,
+    image: '/assets/images/dungeons/T_WNE.png',
+    walkability: [
+        [0, 0, 1, 1, 0, 0],
+        [0, 0, 1, 1, 0, 0],
+        [1, 1, 1, 1, 1, 1],
+        [1, 1, 1, 1, 1, 1]
+    ],
+    exits: ['W', 'N', 'E']
+};
+
+const T_WSE = {
+    id: 'T_WSE',
+    tileType: 'T',
+    width: 6,
+    height: 4,
+    image: '/assets/images/dungeons/T_WSE.png',
+    walkability: [
+        [1, 1, 1, 1, 1, 1],
+        [1, 1, 1, 1, 1, 1],
+        [0, 0, 1, 1, 0, 0],
+        [0, 0, 1, 1, 0, 0]
+    ],
+    exits: ['W', 'S', 'E']
+};
+
+const T_WNS = {
+    id: 'T_WNS',
+    tileType: 'T',
+    width: 4,
+    height: 6,
+    image: '/assets/images/dungeons/T_WNS.png',
+    walkability: [
+        [0, 0, 1, 1],
+        [0, 0, 1, 1],
+        [1, 1, 1, 1],
+        [1, 1, 1, 1],
+        [0, 0, 1, 1],
+        [0, 0, 1, 1]
+    ],
+    exits: ['W', 'N', 'S']
+};
+
+// ============================================================================
+// CORRIDORS (2x6 or 6x2 with 2-tile rows)
+// ============================================================================
+
+// Corridor 1 - East-West (horizontal)
+const CORRIDOR1_EW = {
+    id: 'corridor1_EW',
+    tileType: 'corridor',
+    width: 6,
+    height: 2,
+    image: '/assets/images/dungeons/corridor1_EW.png',
+    walkability: [
+        [1, 1, 1, 1, 1, 1],
+        [1, 1, 1, 1, 1, 1]
+    ],
+    exits: ['E', 'W']
+};
+
+// Corridor 1 - North-South (vertical)
+const CORRIDOR1_NS = {
+    id: 'corridor1_NS',
+    tileType: 'corridor',
+    width: 2,
+    height: 6,
+    image: '/assets/images/dungeons/corridor1_NS.png',
+    walkability: [
+        [1, 1],
+        [1, 1],
+        [1, 1],
+        [1, 1],
+        [1, 1],
+        [1, 1]
+    ],
+    exits: ['N', 'S']
+};
+
+// Corridor 2 - East-West (horizontal)
+const CORRIDOR2_EW = {
+    id: 'corridor2_EW',
+    tileType: 'corridor',
+    width: 6,
+    height: 2,
+    image: '/assets/images/dungeons/corridor2_EW.png',
+    walkability: [
+        [1, 1, 1, 1, 1, 1],
+        [1, 1, 1, 1, 1, 1]
+    ],
+    exits: ['E', 'W']
+};
+
+// Corridor 2 - North-South (vertical)
+const CORRIDOR2_NS = {
+    id: 'corridor2_NS',
+    tileType: 'corridor',
+    width: 2,
+    height: 6,
+    image: '/assets/images/dungeons/corridor2_NS.png',
+    walkability: [
+        [1, 1],
+        [1, 1],
+        [1, 1],
+        [1, 1],
+        [1, 1],
+        [1, 1]
+    ],
+    exits: ['N', 'S']
+};
+
+// Corridor 3 - East-West (horizontal)
+const CORRIDOR3_EW = {
+    id: 'corridor3_EW',
+    tileType: 'corridor',
+    width: 6,
+    height: 2,
+    image: '/assets/images/dungeons/corridor3_EW.png',
+    walkability: [
+        [1, 1, 1, 1, 1, 1],
+        [1, 1, 1, 1, 1, 1]
+    ],
+    exits: ['E', 'W']
+};
+
+// Corridor 3 - North-South (vertical)
+const CORRIDOR3_NS = {
+    id: 'corridor3_NS',
+    tileType: 'corridor',
+    width: 2,
+    height: 6,
+    image: '/assets/images/dungeons/corridor3_NS.png',
+    walkability: [
+        [1, 1],
+        [1, 1],
+        [1, 1],
+        [1, 1],
+        [1, 1],
+        [1, 1]
+    ],
+    exits: ['N', 'S']
+};
+
+// ============================================================================
+// TILE COLLECTIONS
+// ============================================================================
+
+export const TILE_DEFINITIONS = {
+    // Rooms
+    room_4x4_normal: ROOM_4X4_NORMAL,
+    room_4x4_circle: ROOM_4X4_CIRCLE,
+    room_4x4_skeleton: ROOM_4X4_SKELETON,
+    room_4x6_altar: ROOM_4X6_ALTAR,
+    room_4x6_tomb: ROOM_4X6_TOMB,
+    room_4x6_stairs: ROOM_4X6_STAIRS,
+
+    // L-shapes
+    L_NE: L_NE,
+    L_SE: L_SE,
+    L_WS: L_WS,
+    L_WN: L_WN,
+
+    // T-junctions
+    T_NES: T_NES,
+    T_WNE: T_WNE,
+    T_WSE: T_WSE,
+    T_WNS: T_WNS,
+
+    // Corridors
+    corridor1_EW: CORRIDOR1_EW,
+    corridor1_NS: CORRIDOR1_NS,
+    corridor2_EW: CORRIDOR2_EW,
+    corridor2_NS: CORRIDOR2_NS,
+    corridor3_EW: CORRIDOR3_EW,
+    corridor3_NS: CORRIDOR3_NS
+};
+
+// Collections by type for easy filtering
+export const ROOMS = [
+    ROOM_4X4_NORMAL,
+    ROOM_4X4_CIRCLE,
+    ROOM_4X4_SKELETON,
+    ROOM_4X6_ALTAR,
+    ROOM_4X6_TOMB,
+    ROOM_4X6_STAIRS
+];
+
+export const L_SHAPES = [
+    L_NE,
+    L_SE,
+    L_WS,
+    L_WN
+];
+
+export const T_JUNCTIONS = [
+    T_NES,
+    T_WNE,
+    T_WSE,
+    T_WNS
+];
+
+export const CORRIDORS = [
+    CORRIDOR1_EW,
+    CORRIDOR1_NS,
+    CORRIDOR2_EW,
+    CORRIDOR2_NS,
+    CORRIDOR3_EW,
+    CORRIDOR3_NS
+];
+
+// Helper function to get tile definition by ID
+export function getTileDefinition(tileId) {
+    return TILE_DEFINITIONS[tileId] || null;
+}
+
+// Helper function to get tiles by type
+export function getTilesByType(tileType) {
+    switch (tileType) {
+        case 'room':
+            return ROOMS;
+        case 'L':
+            return L_SHAPES;
+        case 'T':
+            return T_JUNCTIONS;
+        case 'corridor':
+            return CORRIDORS;
+        default:
+            return [];
+    }
+}
diff --git a/src/main.js b/src/main.js
index 262be3d..eca5071 100644
--- a/src/main.js
+++ b/src/main.js
@@ -4,7 +4,9 @@ import { OrbitControls } from 'three/examples/jsm/controls/OrbitControls.js';
 import { io } from "socket.io-client";
 import { turnManager, PHASES } from './systems/TurnManager.js';
 import { dungeonDeck } from './dungeon/DungeonDecks.js';
+import * as TileDefinitions from './dungeon/TileDefinitions.js';
 import { eventDeck } from './dungeon/EventDeck.js'; // Import Event Deck
+import { TILE_DEFINITIONS, getTileDefinition } from './dungeon/TileDefinitions.js';
 
 // --- NETWORK SETUP ---
 // Dynamic connection to support playing from mobile on the same network
@@ -78,9 +80,11 @@ const ASSETS = {
 // --- GENERACIÓN DE MAZMORRA (DINÁMICA) ---
 function generateDungeon() {
     // Start with a single entry room 4x4
+    const startTileDef = getTileDefinition('room_4x4_normal');
     const startRoom = {
         id: 1,
-        tile: { type: 'tile_base', x: 0, y: 0 },
+        tileDef: startTileDef, // Store the full tile definition
+        tile: { id: startTileDef.id, x: 0, y: 0 },
         walls: [], // Walls calculated dynamically later or fixed for start
         doors: [
             { side: 'N', gridX: 2, gridY: 0, leadsTo: null, id: 'door_start_N', isOpen: false }
@@ -99,9 +103,6 @@ function generateDungeon() {
 
 // --- EXPLORACIÓN DINÁMICA ---
 function exploreRoom(originRoom, door) {
-    const card = dungeonDeck.drawCard();
-    if (!card) return null;
-
     // Draw an event card
     const eventCard = eventDeck.drawCard();
     if (eventCard) {
@@ -109,18 +110,90 @@ function exploreRoom(originRoom, door) {
         showUIEvent(eventCard);
     }
 
-    const nextTileDef = ASSETS.tiles[card.type];
-    const newRoomId = ROOMS.rooms.length + 1;
-
-    // 1. Determinar lado de entrada (Opuesto al de salida)
+    // Determine entry side (opposite of exit)
     let entrySide;
     if (door.side === 'N') entrySide = 'S';
     else if (door.side === 'S') entrySide = 'N';
     else if (door.side === 'E') entrySide = 'W';
     else if (door.side === 'W') entrySide = 'E';
 
-    // 2. Determinar posición local de la puerta de entrada en la nueva sala
-    // Centramos la puerta en el muro correspondiente
+    // Try to draw a compatible abstract tile type (up to 10 attempts)
+    let card = null;
+    let alignmentOffset = 0;
+    let attempts = 0;
+    const maxAttempts = 10;
+
+    while (attempts < maxAttempts && !card) {
+        const abstractCard = dungeonDeck.drawCompatibleCard(originRoom.tileDef.tileType);
+        if (!abstractCard) {
+            console.warn("Could not draw compatible card");
+            return null;
+        }
+
+        console.log(`Drew abstract type: ${abstractCard.type}`);
+
+        // Select concrete tile variant based on abstract type
+        let candidates = [];
+
+        switch (abstractCard.type) {
+            case 'room_4x4':
+                candidates = TileDefinitions.ROOMS.filter(r => r.width === 4 && r.height === 4);
+                break;
+            case 'room_4x6':
+                candidates = TileDefinitions.ROOMS.filter(r => r.width === 4 && r.height === 6);
+                break;
+            case 'corridor':
+                // Filter by orientation (EW or NS based on exit direction)
+                const isExitHorizontal = door.side === 'E' || door.side === 'W';
+                candidates = TileDefinitions.CORRIDORS.filter(c => {
+                    const isCorridorHorizontal = c.exits.includes('E') && c.exits.includes('W');
+                    return isExitHorizontal === isCorridorHorizontal;
+                });
+                break;
+            case 'L':
+                candidates = [...TileDefinitions.L_SHAPES];
+                break;
+            case 'T':
+                candidates = [...TileDefinitions.T_JUNCTIONS];
+                break;
+        }
+
+        if (candidates.length === 0) {
+            console.warn(`No candidates found for type ${abstractCard.type}`);
+            attempts++;
+            continue;
+        }
+
+        // Try all candidates and collect those that fit
+        const fittingVariants = [];
+        for (const variant of candidates) {
+            const connectionResult = canConnectTiles(originRoom, variant, door.side);
+            if (connectionResult.valid) {
+                fittingVariants.push({ variant, offset: connectionResult.offset });
+            }
+        }
+
+        if (fittingVariants.length > 0) {
+            // RANDOM selection from fitting variants
+            const selected = fittingVariants[Math.floor(Math.random() * fittingVariants.length)];
+            card = selected.variant;
+            alignmentOffset = selected.offset;
+            console.log(`✓ Selected ${card.id} (${card.tileType}) randomly from ${fittingVariants.length} fitting variants, offset ${alignmentOffset}`);
+        } else {
+            console.log(`✗ No ${abstractCard.type} variant fits, trying another tile type...`);
+            attempts++;
+        }
+    }
+
+    if (!card) {
+        console.error("Could not find valid tile after", maxAttempts, "attempts");
+        return null;
+    }
+
+    const nextTileDef = card;
+    const newRoomId = ROOMS.rooms.length + 1;
+
+    // Calculate entry door position in the new tile
     let entryGridX, entryGridY;
 
     if (entrySide === 'N') {
@@ -137,13 +210,20 @@ function exploreRoom(originRoom, door) {
         entryGridY = Math.floor(nextTileDef.height / 2);
     }
 
-    // 3. Calcular posición absoluta de la nueva sala para que las puertas coincidan
-    // Fórmula: NewRoomPos = OriginRoomPos + OriginDoorLocalPos - EntryDoorLocalPos
-    // Esto hace que OriginDoorWorldPos == EntryDoorWorldPos
-    const newX = originRoom.tile.x + door.gridX - entryGridX;
-    const newY = originRoom.tile.y + door.gridY - entryGridY;
+    // Calculate absolute position for the new tile
+    let newX = originRoom.tile.x + door.gridX - entryGridX;
+    let newY = originRoom.tile.y + door.gridY - entryGridY;
 
-    // Comprobar colisiones
+    // Apply alignment offset based on exit direction
+    if (door.side === 'N' || door.side === 'S') {
+        // Vertical connection - offset horizontally
+        newX += alignmentOffset;
+    } else {
+        // Horizontal connection - offset vertically
+        newY += alignmentOffset;
+    }
+
+    // Check for collisions
     if (!isAreaFree(newX, newY, nextTileDef.width, nextTileDef.height)) {
         console.warn("Cannot place room: Collision detected!");
         return null;
@@ -151,17 +231,22 @@ function exploreRoom(originRoom, door) {
 
     const newRoom = {
         id: newRoomId,
-        tile: { type: card.type, x: newX, y: newY },
+        tileDef: nextTileDef,
+        tile: { id: nextTileDef.id, x: newX, y: newY },
         walls: ['N', 'S', 'E', 'W'],
         doors: [],
         entities: []
     };
 
-    // Crear la puerta de entrada
+    // Determine if we should place a door or open connection
+    const placeDoor = shouldPlaceDoor(originRoom.tileDef.tileType, nextTileDef.tileType);
+
+    // Create the entry door/connection
     const entryDoor = {
         side: entrySide,
         leadsTo: originRoom.id,
-        isOpen: true,
+        isOpen: !placeDoor, // Open if no door, closed if door
+        isDoor: placeDoor,
         id: `door_${newRoomId}_to_${originRoom.id}`,
         gridX: entryGridX,
         gridY: entryGridY
@@ -169,18 +254,19 @@ function exploreRoom(originRoom, door) {
 
     newRoom.doors.push(entryDoor);
 
-    // Generar salidas adicionales según la carta
-    card.exits.forEach(exitDir => {
-        if (exitDir === entrySide) return; // Ya tenemos esta puerta
+    // Generate additional exits based on the tile definition
+    nextTileDef.exits.forEach(exitDir => {
+        if (exitDir === entrySide) return; // Already have this connection
 
         const exitDoor = {
             side: exitDir,
-            leadsTo: null, // Desconocido
+            leadsTo: null,
             isOpen: false,
+            isDoor: true, // Will be determined when connected
             id: `door_${newRoomId}_${exitDir}`
         };
 
-        // Calcular coordenadas de la puerta en la nueva sala
+        // Calculate door coordinates
         if (exitDir === 'N') {
             exitDoor.gridX = Math.floor(nextTileDef.width / 2);
             exitDoor.gridY = 0;
@@ -199,6 +285,7 @@ function exploreRoom(originRoom, door) {
     });
 
     ROOMS.rooms.push(newRoom);
+    console.log(`✓ Tile ${newRoomId} (${nextTileDef.tileType}) created: ${nextTileDef.id} at (${newX}, ${newY})`);
     return newRoom;
 }
 
@@ -514,7 +601,9 @@ function isAdjacent(p1, p2) {
 // Verificar si una posición está dentro de una sala
 function isPositionInRoom(x, y, room) {
     const tile = room.tile;
-    const tileDef = ASSETS.tiles[tile.type];
+    const tileDef = room.tileDef;
+    if (!tileDef) return false;
+
     const minX = tile.x;
     const maxX = tile.x + tileDef.width - 1;
     const minY = tile.y;
@@ -527,16 +616,14 @@ function isPositionInRoom(x, y, room) {
 // x, y: Coordenadas Grid (Top-Left)
 // width, height: Dimensiones Grid
 function isAreaFree(x, y, width, height) {
-    // Definir Rectángulo A (Propuesto)
-    // Usamos buffer de 0.1 para evitar contactos exactos que no son solapamientos
-    // Pero en Grid discreto, strict inequality es mejor.
     const aMinX = x;
     const aMaxX = x + width;
     const aMinY = y;
     const aMaxY = y + height;
 
     for (const room of ROOMS.rooms) {
-        const tileDef = ASSETS.tiles[room.tile.type];
+        const tileDef = room.tileDef;
+        if (!tileDef) continue;
 
         // Rectángulo B (Existente)
         const bMinX = room.tile.x;
@@ -545,7 +632,6 @@ function isAreaFree(x, y, width, height) {
         const bMaxY = room.tile.y + tileDef.height;
 
         // Check Overlap (Intersección de AABB)
-        // No hay colisión si alguno está totalmente a un lado del otro
         const noOverlap = aMaxX <= bMinX || aMinX >= bMaxX || aMaxY <= bMinY || aMinY >= bMaxY;
 
         if (!noOverlap) {
@@ -568,14 +654,21 @@ function isPositionDoor(x, y, room) {
 }
 
 
-// Verificar si una celda es transitable (bloquear puertas cerradas)
+
+// Verificar si una celda es transitable usando la matriz de walkability
 function isWalkable(x, y) {
     for (const roomId of ROOMS.visitedRooms) {
         const room = ROOMS.rooms.find(r => r.id === roomId);
-        if (!room) continue;
+        if (!room || !room.tileDef) continue;
 
         if (isPositionInRoom(x, y, room)) {
-            return true;
+            // Get local coordinates within the tile
+            const localX = x - room.tile.x;
+            const localY = y - room.tile.y;
+
+            // Check walkability matrix
+            const walkValue = room.tileDef.walkability[localY][localX];
+            return walkValue > 0; // 0 = not walkable, >0 = walkable
         }
 
         // Verificar puertas
@@ -589,6 +682,254 @@ function isWalkable(x, y) {
     return false;
 }
 
+// Get the layer/height of a specific position
+function getTileLayer(x, y) {
+    for (const roomId of ROOMS.visitedRooms) {
+        const room = ROOMS.rooms.find(r => r.id === roomId);
+        if (!room || !room.tileDef) continue;
+
+        if (isPositionInRoom(x, y, room)) {
+            const localX = x - room.tile.x;
+            const localY = y - room.tile.y;
+
+            return room.tileDef.walkability[localY][localX];
+        }
+    }
+    return 0; // Not in any room
+}
+
+// Check if movement between two positions with different layers is allowed
+function canTransitionLayers(fromX, fromY, toX, toY) {
+    const fromLayer = getTileLayer(fromX, fromY);
+    const toLayer = getTileLayer(toX, toY);
+
+    // Same layer or one is a stair
+    if (fromLayer === toLayer || fromLayer === 9 || toLayer === 9) {
+        return true;
+    }
+
+    // Different layers - check if there's a stair adjacent
+    const layerDiff = Math.abs(fromLayer - toLayer);
+    if (layerDiff > 1) {
+        return false; // Can't jump more than 1 layer
+    }
+
+    // Check if there's a stair (9) adjacent to either position
+    const adjacentPositions = [
+        { x: fromX - 1, y: fromY },
+        { x: fromX + 1, y: fromY },
+        { x: fromX, y: fromY - 1 },
+        { x: fromX, y: fromY + 1 },
+        { x: toX - 1, y: toY },
+        { x: toX + 1, y: toY },
+        { x: toX, y: toY - 1 },
+        { x: toX, y: toY + 1 }
+    ];
+
+    for (const pos of adjacentPositions) {
+        if (getTileLayer(pos.x, pos.y) === 9) {
+            return true; // Found a stair
+        }
+    }
+
+    return false; // No stair found
+}
+
+// Determine if a door should be placed between two tile types
+function shouldPlaceDoor(tileTypeA, tileTypeB) {
+    // Doors only between Room ↔ Corridor
+    return (tileTypeA === 'room' && tileTypeB === 'corridor') ||
+        (tileTypeA === 'corridor' && tileTypeB === 'room');
+}
+
+// Validate walkability alignment between two tiles at their connection point
+// Returns: { valid: boolean, offset: number } - offset is how much to shift tileB to align with tileA
+function validateWalkabilityAlignment(tileDefA, posA, tileDefB, posB, exitSide) {
+    // Get the edge cells that will connect
+    const edgeA = getEdgeCells(tileDefA, exitSide);
+    const edgeB = getEdgeCells(tileDefB, getOppositeSide(exitSide));
+
+    console.log(`[ALIGN] Checking ${tileDefA.id} (${exitSide}) → ${tileDefB.id}`);
+    console.log(`[ALIGN] EdgeA (${tileDefA.id}):`, edgeA);
+    console.log(`[ALIGN] EdgeB (${tileDefB.id}):`, edgeB);
+
+    // Special handling for corridor connections
+    // Corridors are 2 tiles wide, rooms/L/T are typically 4 tiles wide
+    // We need to find where the corridor's walkable area aligns with the room's walkable area
+
+    if (edgeA.length !== edgeB.length) {
+        // Different edge lengths - need to find alignment
+        const smallerEdge = edgeA.length < edgeB.length ? edgeA : edgeB;
+        const largerEdge = edgeA.length < edgeB.length ? edgeB : edgeA;
+        const isASmaller = edgeA.length < edgeB.length;
+
+        console.log(`[ALIGN] Different sizes: ${edgeA.length} vs ${edgeB.length}`);
+        console.log(`[ALIGN] isASmaller: ${isASmaller}`);
+
+        // Find walkable cells in smaller edge
+        const smallerWalkable = smallerEdge.filter(cell => cell > 0);
+        if (smallerWalkable.length === 0) {
+            console.warn('[ALIGN] No walkable cells in smaller edge');
+            return { valid: false, offset: 0 };
+        }
+
+        const smallerWidth = smallerEdge.length;
+        const largerWidth = largerEdge.length;
+
+        // FIRST: Try offset 0 (no displacement needed)
+        let validAtZero = true;
+        for (let i = 0; i < smallerWidth; i++) {
+            const smallCell = smallerEdge[i];
+            const largeCell = largerEdge[i];
+
+            const isSmallWalkable = smallCell > 0;
+            const isLargeWalkable = largeCell > 0;
+
+            console.log(`[ALIGN] Offset 0, index ${i}: small=${smallCell}(${isSmallWalkable}) vs large=${largeCell}(${isLargeWalkable})`);
+
+            if (isSmallWalkable !== isLargeWalkable) {
+                validAtZero = false;
+                console.log(`[ALIGN] ❌ Offset 0 FAILED at index ${i}: walkability mismatch`);
+                break;
+            }
+        }
+
+        if (validAtZero) {
+            console.log(`✓ [ALIGN] Valid alignment at offset 0 (no displacement needed)`);
+            return { valid: true, offset: 0 };
+        }
+
+        // If offset 0 doesn't work, try offset of 2 (corridor width)
+        // This aligns the corridor with the other walkable section of the L/T
+        const offset = 2;
+        if (offset <= largerWidth - smallerWidth) {
+            let valid = true;
+            for (let i = 0; i < smallerWidth; i++) {
+                const smallCell = smallerEdge[i];
+                const largeCell = largerEdge[offset + i];
+
+                const isSmallWalkable = smallCell > 0;
+                const isLargeWalkable = largeCell > 0;
+
+                if (isSmallWalkable !== isLargeWalkable) {
+                    valid = false;
+                    console.log(`[ALIGN] Offset ${offset} failed at index ${i}: ${smallCell} vs ${largeCell}`);
+                    break;
+                }
+            }
+
+            if (valid) {
+                // Calculate final offset
+                // If A (corridor) is smaller than B (L/T), we need to shift B by +offset
+                // If B is smaller than A, we need to shift B by -offset
+                const finalOffset = isASmaller ? offset : -offset;
+                console.log(`✓ [ALIGN] Valid alignment at offset ${offset}, final offset: ${finalOffset} (isASmaller: ${isASmaller})`);
+                return { valid: true, offset: finalOffset };
+            }
+        }
+
+        console.warn('[ALIGN] Could not find valid alignment for edges of different sizes');
+        return { valid: false, offset: 0 };
+    }
+
+    // Same length - check direct alignment
+    for (let i = 0; i < edgeA.length; i++) {
+        const cellA = edgeA[i];
+        const cellB = edgeB[i];
+
+        // Rule: Cannot connect 0 (not walkable) with >0 (walkable)
+        const isAWalkable = cellA > 0;
+        const isBWalkable = cellB > 0;
+
+        if (isAWalkable !== isBWalkable) {
+            console.warn(`[ALIGN] Walkability mismatch at index ${i}: ${cellA} vs ${cellB}`);
+            return { valid: false, offset: 0 };
+        }
+    }
+
+    return { valid: true, offset: 0 };
+}
+
+// Get edge cells from a tile definition for a given side
+function getEdgeCells(tileDef, side) {
+    const { walkability, width, height } = tileDef;
+    const cells = [];
+
+    switch (side) {
+        case 'N':
+            // Top row
+            for (let x = 0; x < width; x++) {
+                cells.push(walkability[0][x]);
+            }
+            break;
+        case 'S':
+            // Bottom row
+            for (let x = 0; x < width; x++) {
+                cells.push(walkability[height - 1][x]);
+            }
+            break;
+        case 'E':
+            // Right column
+            for (let y = 0; y < height; y++) {
+                cells.push(walkability[y][width - 1]);
+            }
+            break;
+        case 'W':
+            // Left column
+            for (let y = 0; y < height; y++) {
+                cells.push(walkability[y][0]);
+            }
+            break;
+    }
+
+    return cells;
+}
+
+// Get opposite side
+function getOppositeSide(side) {
+    const opposites = { 'N': 'S', 'S': 'N', 'E': 'W', 'W': 'E' };
+    return opposites[side];
+}
+
+// Check if two tiles can connect based on type rules and walkability alignment
+// Returns: { valid: boolean, offset: number } - offset for positioning the new tile
+function canConnectTiles(roomA, tileDefB, exitSide) {
+    const tileDefA = roomA.tileDef;
+
+    // Check type compatibility
+    const typeA = tileDefA.tileType;
+    const typeB = tileDefB.tileType;
+
+    const validConnections = {
+        'room': ['room', 'corridor'],
+        'corridor': ['room', 'corridor', 'L', 'T'],
+        'L': ['corridor'],
+        'T': ['corridor']
+    };
+
+    if (!validConnections[typeA] || !validConnections[typeA].includes(typeB)) {
+        console.warn(`Invalid connection: ${typeA} cannot connect to ${typeB}`);
+        return { valid: false, offset: 0 };
+    }
+
+    // CRITICAL: Check that tileB has an exit in the opposite direction
+    // If we exit through N, the new tile must have S in its exits
+    const requiredExit = getOppositeSide(exitSide);
+    if (!tileDefB.exits.includes(requiredExit)) {
+        console.warn(`Exit direction mismatch: ${tileDefB.id} doesn't have required exit '${requiredExit}' (exiting via '${exitSide}')`);
+        return { valid: false, offset: 0 };
+    }
+
+    // Check walkability alignment and get offset
+    const alignmentResult = validateWalkabilityAlignment(tileDefA, roomA.tile, tileDefB, null, exitSide);
+    if (!alignmentResult.valid) {
+        console.warn('Walkability alignment failed');
+        return { valid: false, offset: 0 };
+    }
+
+    return alignmentResult;
+}
+
 // --- CREACIÓN DE MARCADORES ---
 function createPathMarker(stepNumber) {
     const canvas = document.createElement('canvas');
@@ -996,10 +1337,17 @@ function checkDoorTransition(unit, currentRoom) {
     }
 }
 
+
 function getDoorGridPosition(room, door) {
     const tile = room.tile;
-    const tileWidth = ASSETS.tiles[tile.type].width;
-    const tileHeight = ASSETS.tiles[tile.type].height;
+    const tileDef = room.tileDef;
+    if (!tileDef) {
+        console.error("Room", room.id, "has no tileDef in getDoorGridPosition!");
+        return { x: tile.x, y: tile.y };
+    }
+
+    const tileWidth = tileDef.width;
+    const tileHeight = tileDef.height;
 
     switch (door.side) {
         case 'N':
@@ -1102,21 +1450,22 @@ async function renderRoom(room) {
         entities: []
     };
 
-    // Renderizar tile
-    // Renderizar tile
-    const tileDef = ASSETS.tiles[room.tile.type];
-    const baseTex = await loadTexture(tileDef.src);
+    // Renderizar tile usando la nueva definición
+    const tileDef = room.tileDef;
+    if (!tileDef) {
+        console.error("Room", room.id, "has no tileDef!");
+        return;
+    }
+
+    const baseTex = await loadTexture(tileDef.image);
     const tileTex = baseTex.clone(); // CLONAR para no afectar a otras salas
     tileTex.needsUpdate = true; // Asegurar que Three.js sepa que es nueva
 
     tileTex.wrapS = THREE.RepeatWrapping;
     tileTex.wrapT = THREE.RepeatWrapping;
 
-    // Lógica de repetición: La textura base es de 4x4 celdas.
-    // Si la sala es 8x4, repetimos 2 en X, 1 en Y.
-    const repeatX = tileDef.width / 4;
-    const repeatY = tileDef.height / 4;
-    tileTex.repeat.set(repeatX, repeatY);
+    // No repetir la textura - cada tile tiene su propia imagen completa
+    tileTex.repeat.set(1, 1);
 
     const worldWidth = tileDef.width * CONFIG.CELL_SIZE;
     const worldHeight = tileDef.height * CONFIG.CELL_SIZE;
@@ -1374,7 +1723,8 @@ function drawMinimap() {
     let minX = Infinity, maxX = -Infinity, minY = Infinity, maxY = -Infinity;
 
     ROOMS.rooms.forEach(room => {
-        const tileDef = ASSETS.tiles[room.tile.type];
+        const tileDef = room.tileDef;
+        if (!tileDef) return;
         minX = Math.min(minX, room.tile.x);
         maxX = Math.max(maxX, room.tile.x + tileDef.width);
         minY = Math.min(minY, room.tile.y);
@@ -1406,7 +1756,8 @@ function drawMinimap() {
 
     // 2. Dibujar TODAS las Salas
     ROOMS.rooms.forEach(room => {
-        const tileDef = ASSETS.tiles[room.tile.type];
+        const tileDef = room.tileDef;
+        if (!tileDef) return;
 
         const pos = toCanvas(room.tile.x, room.tile.y);
         const w = tileDef.width * scale;