Comments (2)
lasalvavida
commented on July 23, 2024
So, this is a tricky one. combineNodes flattens out the node transforms onto the points correctly. However, even though this model declares a Y-Up transform in the glTF, the vertex shader discards the rotation and scale of the model matrix and applies the Y-Up transform itself. After conversion, the points are already Y-Up, and then the shader applies the transform again.
If you delete the Y-Up transform node and make Plane the root node, this model displays correctly before and after conversion.
I don't think there is a reasonable way to handle people doing custom modifications in the vertex shader like this.
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lilleyse
commented on July 23, 2024
Ok, thanks for looking into this - and yes it's a weird case.
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Related Issues (20)
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