Geometries now automatically use per-vertex colors when drawing if any vertex has a custom color set, otherwise the constant color is used.

Still not a perfect solution, but it works better than before

src/modules/graphics/opengl/wrap_Geometry.cpp

@@ -90,6 +90,9 @@ int w_Geometry_setVertex(lua_State *L)
 		return luaL_error(L, e.what());
 	}
 
+	if (lua_gettop(L) > 6)
+		geom->setVertexColors(true);
+
 	return 0;
 }