That is a good point you raise, but I don’t believe it will solve @Error’s problem. AFAIK, the Emissive Light Source tag forces the surface cache to not cull a given mesh’s cards, to stop emissive objects’ lighting from popping as the camera gets closer or further away. However, it can only stop the surface cache from culling cards if the mesh had cards to begin with, and if an object is too small to have cards it won’t be in the consideration at all.