128c95438f
Since UDIM baking support in 6787cc13d4, the normalization of
diplacement heights was always based on the min/max height detected in
the _last_ tile, which could lead to clipping if the last tile had very
subtle (or no) displacement.
Now getting the min/max is spread across all images.
This also takes the first thread into account for getting the min/max (which for some reason was skipped).
Pull Request: https://projects.blender.org/blender/blender/pulls/109409