This is an interesting piece of sushi, the detail of the filling is colorful. However, I see more than four colors so I don't think this should be labeled under the limitation category. There is no model.txt or texture.png so I can't be too sure. I think it could be improved perhaps using multiple sushi in a tray (like duplicating the same sushi and stacking together). But for the single sushi it looks nice! I especially like how you captured the features of the seaweed wrap with the shine.