fix custom models instancing for different blocks

src/frontend/ContentGfxCache.cpp

@@ -37,8 +37,7 @@ void ContentGfxCache::refresh(const Block& def, const Atlas& atlas) {
     }
     if (def.model.type == BlockModelType::CUSTOM) {
         auto model = assets.require<model::Model>(def.model.name);
-        // temporary dirty fix tbh
+
-        if (def.model.name.find(':') == std::string::npos) {
         for (auto& mesh : model.meshes) {
             size_t pos = mesh.texture.find(':');
             if (pos == std::string::npos) {
@@ -50,7 +49,6 @@ void ContentGfxCache::refresh(const Block& def, const Atlas& atlas) {
                 }
             }
         }
-        }
         models[def.rt.id] = std::move(model);
     }
 }

src/graphics/render/ModelsGenerator.cpp

@@ -62,14 +62,17 @@ void ModelsGenerator::prepare(Content& content, Assets& assets) {
                 );
                 def->model.name = def->name + ".model";
             } else {
-                auto model = assets.get<model::Model>(def->model.name);
+                auto srcModel = assets.get<model::Model>(def->model.name);
-                if (model) {
+                if (srcModel) {
+                    auto model = std::make_unique<model::Model>(*srcModel);
                     for (auto& mesh : model->meshes) {
                         if (mesh.texture.length() && mesh.texture[0] == '$') {
                             int index = std::stoll(mesh.texture.substr(1));
                             mesh.texture = "blocks:" + def->textureFaces[index];
                         }
                     }
+                    def->model.name = name + ".model";
+                    assets.store(std::move(model), def->model.name);
                 }
             }
         }