The only time that it works on my end is that if I add the Unwrap modifier manually before run the script, to both the source and destination objects. If it's added using the maxscript itself, it either failed to run the script or didn't copy the info (I got both of this situation running different combination of steps,…
@poopipe Hmm strange that it didn't work for me. I tried to change the source obj to become the Box_CorrectUV and destination to Box_001 still doesn't work. Though if I have manually add a Unwrap_UVW before running the addModifierWithLocalData script, looks like it works but if the Unwrap_UVW was added using the same…
The objects need to be the same type afaik. So you can't mix Eg. editable poly and editable mesh. If that's not the issue I don't know - the command is new to me. You do need the unwrap uvw there first but I'm honestly stumped as to why. It was adding it fine in script here (on 2019)