@Alex, sorry that I can't feel your pain. I believe this issue can be easily solved in the user space and doesn't warrant a change in the program itself: module Cube( ... centre) { cube( ... center=centre); } module colour( ... ) { color(...) children(); } We have lots of other more important stuff in the to-do list. ----- $ Runsun Pan, PhD $ libs: scadx , doctest , faces ( git ), offline doc ( git ), runscad.py ( 2 , git ), editor of choice: CudaText ( OpenSCAD lexer ); $ Tips ; $ Snippets -- Sent from: http://forum.openscad.org/