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Luya Gao authored
Summary: Adds support to hard_rgb_blend and hard blending shaders in shader.py (HardPhongShader, HardGouraudShader, and HardFlatShader) for changing the background color on which objects are rendered Reviewed By: nikhilaravi Differential Revision: D21746062 fbshipit-source-id: 08001200f4339d6a69c52405c6b8f4cac9f3f56e
65620e71
