I was talking to 3DRobbo a few days ago, about his Mazda RX7 model that he wants to texture with camouflage. The issue of painting across seams came up and I remembered something from my Internship. The technical artists used a 3DS Max procedural material, a plugin from Blur Studios, that required no UV mapping. He then rendered that material to texture via Max’s Render To Texture interface. A very smart way of handling things, saves you the agony of having to paint across seams consistently. Definitely recommended for any artist that wants to texture camouflage.
For the sake of illustrating things, here’s a test from Rob:
The Blur plugins can be found here: