mesh tweaks

more mesh and texture tweaks

Fix more tint meshes

Fix abyssal tint

update some textures. Likely to update a few more. Still has some tint issues and errors in transparency.

Tweak some models

Added in volume_tint objects. Changed to allow Kreisel, in the off chance someone mods in Kreisel Abyssal animals.

add sad substitute model for maachinery extra tile

Fix some access points, esizing, and other tank data. Add in a few machinery placeholders.