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This refactors the code for world to dome light to be shared between USD and Hydra, and makes rotations work for Hydra the same way they do in USD. One small behavior change is that missing image files now render black, matching Cycles and EEVEE more closely. Co-authored-by: Brecht Van Lommel <brecht@blender.org> Pull Request: https://projects.blender.org/blender/blender/pulls/143035