Labs Calculate/Remove UV Distortion

The Calculate UV Distortion node will allow you to calculate UV distortion for the specified UV attribute and export it as a primitive attribute. The node will visualize the distortion by default using a visualizer, but this can be disabled.
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The Remove UV Distortion tool tries to reduce the UV distortion on geometry with pre-existing UVs. It does so by calculating the distortion found in the UVs and cutting new seams based on that. Depending on the polycount of your geometry, this can take some time due to the nature of the used operations.The tool is most useful for cases where you have clear “hotspots” of distortion.
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For more information on SideFXLabs and how to get the tool visit: https://www.sidefx.com/products/sidefx-labs/.
HIP File: https://github.com/sideeffects/SideFXLabsExamples/tree/main/artstation/calculate_remove_uv_distortion/calculate_remove_uv_distortion.hip
Ichthyosaurus by Julian Johnson-Mortimer (model was edited to include distorted UVs for this demo)
https://sketchfab.com/3d-models/ichthyosaurus-ef8609f5efa84984bc1800bdb36aac3c
This post is prepared by Alecto Asperslag: https://www.artstation.com/alecto-marionette

UV compression (blue) and stretching (red) are calculated and visualized.

UV compression (blue) and stretching (red) are calculated and visualized.

Remove UV Distortion SOP provides setting for reducing UV distortion.

Remove UV Distortion SOP provides setting for reducing UV distortion.

Use Calculate UV Distortion SOPs to mark areas of distortion as an attribute. Use Remove UV Distortion SOPs to clean up distortion.

Chaining multiple Remove UV Distortion SOPs with different settings can help with heavily distorted UVs.