Bug fixes, New textures, Node graph for nextbots, and a few more!

This update will take a little while since I'm gonna be working on quite a few things.
Which will probably introduce new bugs like (e.g. Missing textures, Buggy node graph, ETC).

I won't say when the update will be released since I'm currently trying to figure out how to
link custom materials to Hammer++, which sounds like it would be easy but I've tried
EVERYTHING. It won't show the custom materials in the material select tab.

Besides that stuff like bug fixes and adding node graphs should be easy enough.