assets-related refactor

src/graphics/render/BlocksPreview.cpp

@@ -142,5 +142,7 @@ std::unique_ptr<Atlas> BlocksPreview::build(
     fbo.unbind();
 
     Window::viewport(0, 0, Window::width, Window::height);
-    return std::unique_ptr<Atlas>(builder.build(2));
+    auto newAtlas = std::unique_ptr<Atlas>(builder.build(2));
+    newAtlas->prepare();
+    return newAtlas;
 }