Hello. I have the scene with solid fractures of building, lamp “Sun” and “Wind” force field. Sun isn’t animated. During rendering Cycles suddenly begin to render frames as well as lamp “disappeared” and grey “Diffuse” material becomes darker. Why does it happen?
Here is the link to my .blend file: http://www.pasteall.org/blend/35897.
It begins from 2197th frame. I want to notice that the “Sun” “disappears” when either the second layer or both layers are active. When only the first layer with smoke is active the “Sun” doesn’t “disappear” :).