this is a ruff draft example so you all get what I'm talking about but all of dark gray tank will be replaced buy the mech parts temporally shaded in blue.

so there will be 100's n 100's of parts to the tank. so all of the tank will look like a mech.

so regardless of how it's map .a 2D app will be all but worthless and don't see a 3D painter being any better. 

so if allegorithmic ,quixel is the only practical way to texture it. I don't see how it's mapped makes a difference.

 

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Dark Sphere Mage Vengeance