glTF import: support KHR_texture_transform

The KHR_texture_transform extension is not supported yet when importing glTF files using the Datasmith plugin. This is also refered to as “uv tiling” sometimes (plus rotation), and it’s basically the ability to be able to transform the uv coordinates per texture:.

It’s a pretty small but very useful extension which I think is used frequently, so it would be really nice to have it supported:

Example models that don’t render correctly after import:

cc @UE_FlavienP

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Thank you Andrew,
It is in our backlog but I will discuss with the Dev as we did not prioritized it yet.
For 5.0 we did work on supporting KHR_materials_sheen and KHR_materials_clearcoat.