@Martin Bergwerf
Not sure how to tag you properly in my reply, but thank you for answering! I’m not sure I understand what you’re trying to convey about the impact of the image selection though. Is the UV editor changing relative to the image that is selected at the time? I did notice that the MP4 was making the UDIM space look more like a rectangle whereas the Voronoi noise, without a background image, was shaped like the typical UV square.
