Sergey Sharybin
c4fa17c67a
The idea is to allow having a lot of non-intersecting volumes without allocating volume stack to its full size. With the F11285472 file the memory usage goes from 1400 MiB to 1000 on the RTX6000 card. The fix makes it so the integrator work memory is allocated after scene update which has downside of possible less efficient update when some textures don't fit GPU memory, but has an advantage of making proper decision and having a clear and consistent internal API. Fixes memory part of T92014. Differential Revision: https://developer.blender.org/D12966