Brecht Van Lommel
d1a9425a2f
Changes: * After hitting a shadow catcher, re-initialize the volume stack taking into account shadow catcher ray visibility. This ensures that volume objects are included in the stack only if they are shadow catchers. * If there is a volume to be shaded in front of the shadow catcher, the split is now performed in the shade_volume kernel after volume shading is done. * Previously the background pass behind a shadow catcher was done as part of the regular path, now it is done as part of the shadow catcher path. For a shadow catcher path with volumes and visible background, operations are done in this order now: * intersect_closest * shade_volume * shadow catcher split * intersect_volume_stack * shade_background * shade_surface The world volume is currently assumed to be CG, that is it does not exist in the footage. We may consider adding an option to control this, or change the default. With a volume object this control is already possible. This includes refactoring to centralize the logic for next kernel scheduling in intersect_closest.h. Differential Revision: https://developer.blender.org/D13093
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