39e96d9c0f
When EEVEE next removed the Alpha Threshold option a node graph setup was used instead. Based on a USD test asset[1] the original code was designed around only using the Image A channel during import to wire up the nodes. However, the other channels (R, G, or B) are just as valid. We now handle this by wiring up the Separate RGB node, that is already inserted for the scenario in general, to the shader nodes handling the threshold calculation. Also adds additional test coverage for both export and import as well. The Round and LessThan+OneMinus networks remain the only shapes that will be recognized for the processing. [1] https://github.com/usd-wg/assets/tree/main/test_assets/AlphaBlendModeTest Pull Request: https://projects.blender.org/blender/blender/pulls/130346