The Pose Bone Selection used normal matric multiplication, but that mismatched the Depth buffer from all draw engines. They used the optimized matrices from common_view_lib. This change will use the optimized version, so the depth buffer matches and the render artifacts would be correct. Please note that bone selection is not using shcfg and therefore render clipping is still off. Reviewed By: fclem Differential Revision: https://developer.blender.org/D5100