Hello 
I have been facing this problem, My Textures, Models, Meshes, Terrain, Everything is taking ages to load or is not even loading. I removed all Files of Roblox, Un-installed Roblox, Re-Installed it, But still its not working, I had no problems before, so there is no question about my PC. Even the Skyboxes are not loading. Its just black be it day or night.
I am really Puzzled and Un-aware of what to do, Is there any Fix? Please help me out.
Here are a Few Screenshots.
Please help.