90% of Poser users use only 10% of Poser functions. Most plugins and applications are not necessery and you can obtain the same effects with Poser tools only. I do not know why you need python? All scripts only improve basic Poser tools.

If you want to create your own material you must know math. I know that advanced skin testures looks great, but ... most remders are naked or seminaked female warriors. They are interesting for men and they see only 16 colors - like Windows 3.11 Most guys notice detailed nipple texture rather then VSS shader ;)