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Add caching the lightmap unwrapping on import · f7dadc47JFonS authored
This commit adds caching to the lightmap mesh unwraps generated on import. This speeds up re-imports of meshes that haven't changed and also makes sure that the unwraps are consistent across imports. The unwrapping process is not deterministic, so one could end up with a different mapping every time the scene was imported, breaking any previously baked lightmaps. The changes in this commit prevent that from happening.
f7dadc47
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