I first tested before with LocalToParent and ParentToLocal (they bear identity="True" in MOUL and some coordinates in PotS), but it didn't work.
You're right, in world to local and local to world, the coordinates are not the same (I guess that's the "now needless workarounds" ?).
Unfortunately... It doesn't work. I tested with MOUL's coordinates for WorldToLocal and LocalToWorld, with identity="True" or the original coordinates in LocalToParent and ParentToLocal, I made sure the coordinates of the pillar were the same in CC and MOUL... but nothing. So either there is something not working I can't find, either my graphic card can't render it for some reason
. Parenting should be possible across PRPs, right ?
Of course I can use Python, but I prefer everything to be located in the PRP.