I made the groove-along-seam effect by: With my mesh-editing program MAKEOBJ that I wrote, make a 2000x2000 pixel texture map of the jacket and trousers, with shapes black and background white. Call twice a function that MAKEOBJ has to make the background invade the shapes by one pixel width. Use the result as a bump or displacement map. Each texture map area will render with a depressed edge. (Make sure that the seams between the texture map areas are where seams would be in a real uniform.)

I welcome all suggestions about how to make the model more realistic.