I've started using Substance Painter for the textures, it's really intuitive after you get the hang of it. I'll typically draw panel lines, vents, fasteners, thermal protection materials, and other details. I'm really just trying to think about how the ground crews would access stuff, how the complex shapes would be manufactured, and assembled how the pilots get in and out (hand holds, ladders, etc). I'll then add placards and other details. The grunge is largely determined by the locations of the panel lines, so the nice thing there is if you want to add another panel somewhere, the grunge will follow along when you add a new line! There's also a lot of hand placed weathering and grunge. Gun exhaust, leaks, battle damage, etc etc.What's your process for creating textures? I could never grasp the artistic side of it, with the greebles and details. The really hard ones for me were capital ships, since they weren't based on aircraft with panel lines but big ship hull sections and I could never figure out how to make it look interesting.
Edit: is anyone else having trouble attaching images? I hosted this on my own website but the standard upload/attach seems to not be working today