As stated in the subject I'm having an issue with the "transform pieces" dop, basically I have a fractured geometry, packed, and I'm trying to transfer pscale data, then transform each piece, however data does not reach the node. I have not used this one for a while, but I'm pretty sure I'm doing the same as before.
the main cause for it seemingly not working is that you are using packed primitives for your transform and rest points when Transform Pieces detects packed primitives in those inputs it will use packedfulltransform intrinsic instead of instancing point attributes and since those transforms are identical on both inputs it will have no effect in your case
so just insert Extract All Points SOP (Add SOP) to keep only points and your pscale will work as long as you specify at least P in your Attributes To Transform (currently you have it empty)
