VSS and matmatic are not essential features of Poser though they may be useful.

Luxrender ditto.

Python is very useful for quickly doing repetative tasks and you can learn a lot by just looking at scripts. any file ending in .py is just a text file that you can open in wordpad (or other editor) The .pyc are compiled python and you cant look at those. www.python.org is where you will find the python documentation. The poser methods manual is available in the program folder as a pdf file.