Index: binaries/data/mods/public/maps/random/rmgen/errors/Errors.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/maps/random/rmgen/errors/Errors.js
@@ -0,0 +1,31 @@
+class RMGENMethodNotImplementedError extends Error
+{
+	constructor(interface, ...params)
+	{
+		super(...params);
+		this.name = "RMGENMethodNotImplementedError";
+
+		this.interface = interface;
+
+		this.message = `${this.interface}: ${this.message}`;
+	}
+}
+
+class RMGENInvalidTextureError extends Error
+{
+	constructor(file, ...params)
+	{
+		super(...params);
+		this.name = "RMGENInvalidTextureError";
+	}
+}
+
+class RMGENInvalidTemplateError extends Error
+{
+	constructor(file, ...params)
+	{
+		super(...params);
+		this.name = "RMGENInvalidTemplateError";
+	}
+}
+
Index: binaries/data/mods/public/maps/random/rmgen/texture/EntityTexture.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/maps/random/rmgen/texture/EntityTexture.js
@@ -0,0 +1,22 @@
+class EntityTexture extends ITexture
+{
+	constructor(textureName, templateName)
+	{
+		super();
+
+		if (!textureName || !(textureName instanceof String))
+			throw new RMGENInvalidTextureError();
+
+		if (!templateName || !(templateName instanceof String))
+			throw new RMGENInvalidTemplateError();
+
+		this.textureName = textureName;
+		this.templateName = templateName;
+	}
+
+	paint(pos)
+	{
+		g_Map.setTerrainEntity(this.templateName, 0, new Vector2D(0.5, 0.5).add(position), randomAngle());
+		g_Map.setTexture(pos, this.textureName);
+	}
+}
Index: binaries/data/mods/public/maps/random/rmgen/texture/ITexture.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/maps/random/rmgen/texture/ITexture.js
@@ -0,0 +1,9 @@
+class ITexture
+{
+	paint(tile)
+	{
+		throw new RMGENMethodNotImplementedError(ITexture);
+	}
+}
+
+// ITexture.textureCache = new Map(); // Only encourages doing pointless things.
Index: binaries/data/mods/public/maps/random/rmgen/texture/RandomTexture.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/maps/random/rmgen/texture/RandomTexture.js
@@ -0,0 +1,17 @@
+class RandomTexture extends ITexture
+{
+	constructor(textures)
+	{
+		super();
+
+		if (!textures || !(textures instanceof Array) || !textures.every(texture => texture instanceof ITexture))
+			throw new RMGENInvalidTextureError();
+
+		this.textures = textures;
+	}
+
+	paint(pos)
+	{
+		pickRandom(this.textures).place(pos);
+	}
+}
Index: binaries/data/mods/public/maps/random/rmgen/texture/SimpleTexture.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/maps/random/rmgen/texture/SimpleTexture.js
@@ -0,0 +1,17 @@
+class SimpleTexture extends ITexture
+{
+	constructor(textureName)
+	{
+		super();
+
+		if (!textureName || !(textureName instanceof String))
+			throw new RMGENInvalidTextureError();
+
+		this.textureName = textureName;
+	}
+
+	paint(pos)
+	{
+		g_Map.setTexture(pos, this.textureName);
+	}
+}