Hi,

There´s an error when you try to assign a color to a PaperPolygon2D. 

> Invalid access to property or key 'auto_name_params' on a base object of type 'Node3D (PaperSkeleton)'.

Line 149 in paper_polygon_2d.gd

An easy fix, but I suspect you would want to know. :)

Thanks again for a great addon. 

Thanks for pointing that out to me. I've now made another update that should fix that issue, alongside some other small fixes and changes.