P-167: Paranoia: Update 12: Art Assets Part 4

I have mostly been working on finishing the environment art and doing some debugging lately.

I ran into a strange bug with an object which used a multi/sub object material (IE the object uses two textures, which are applied to one object). For some reason, I could not get both distinct materials to show up in the engine.

It eventually turned out to be a problem with the naming conventions in the material. The naming conventions in the modelling tool were clashing with existing materials in T3D, and this caused the issues.

I have also fixed a number of other, smaller bugs.

The next goal is to finish the environment art (internal doors and windows still need to be done) and then work on the AI enemies.