Haven't really toyed with the partials that much. The bug hits particularly nasty with the topmost layer. Maleposer.com has some nifty .mt5 files to fix a singular material and they work well. I did observe that you could even leave out the p4-specific settings in a MAT and as long as the new shader areas were present, it will change fine - so it almost appears that there's a rendundancy there -- it may be a backwards compatibility setting. So for a P5-only MAT, you could start it like this: { version { number 5 } figure { material SkinTorso { shaderTree { node "poser" "PoserSurface" { name "PoserSurface" pos 10 10 showPreview 1 nodeInput "Diffuse_Color" { name "Diffuse_Color" value 1 1 1 parmR NO_PARM parmG NO_PARM parmB NO_PARM node NO_NODE file "" } ... etc, etc...

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