Blender Git Commit Log

Fix various cleanup issues and inconsistencies.

All volumes are held in the scene volumes list now, so VolumeManager doesn't need
to free them explicitly.

The ImageManager reference in VoxelAttribute is an artifact from smoke rendering,
this should be phased out eventually and can be assumed to be NULL for Volumes.

Make sure the VolumeManager cleans up the device memory properly, in particular
the ray intersector instances must be freed.