Apparently the transformPOP isn’t using the transform matrix parameter.
transformMatBug.tox (1.0 KB)
Thanks for the report, looks it got lost at some point, we’ll fix it!
This has been fixed in alpha 6, 2023.32374
However the xform matrix and lookup params don’t work when Map features are used, this is a known bug (also when weight attribute is used but in that case the params get disabled at least)