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Alex Greene authored
Summary: Modified the compositor background color tests to account for either a 3rd or 4th channel. Also replaced hard coding of channel value with C. Implemented changes to alpha channel appending logic, and cleaned up extraneous warnings and checks, per task instructions. Fixes https://github.com/facebookresearch/pytorch3d/issues/1048 Reviewed By: bottler Differential Revision: D34305312 fbshipit-source-id: 2176c3bdd897d1a2ba6ff4c6fa801fea889e4f02
59972b12
