47f9b7a98e
Previously with adaptive subdivision this happened to work with the N attribute, but that was not meant to be undisplaced. This adds a new undisplaced_N attribute specifically for this purpose. For backwards compatibility in Blender 4.5, this also keeps N undisplaced. But that will be changed in 5.0. Pull Request: https://projects.blender.org/blender/blender/pulls/142090
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