[hdEmbree] Initial UsdLux reference implementation #4
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This modifies the hdEmbree example plugin to do direct lighting so as to provide a reference implementation of the expected behaviour for UsdLux. If no lights are present in the stage, the old ambient occlusion path will be used.
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Description of Change(s)
This modifies the hdEmbree example plugin to do direct lighting so as to provide a reference implementation of the expected behaviour for UsdLux.
If no lights are present in the stage, the old ambient occlusion path will be used.
NOTE: This chain of PRs was made separate from the PR documenting expected behavior: