Hi bagginsbill! Nice to see you're still around.

I haven't looked into this in much detail, but apparently Mudbox has something called a projection brush which lets one clone from an image onto the model where they overlay in the 3d workspace. The video you linked to seems to essentially use a custom UV map patch for each projection direction, which means there's an extra step involved and the overall workflow is - I presume - not nearly as smooth.

When I get to that point, I'll try making a photo-base texture in Blender, anyway, whether or not is has a projection brush by then, and see how I like it. The endgame would of course be to paint or sculpt all my maps by hand based on references, but surely that'll require a lot of study and practice before I can hope to produce anything useful.

-- I'm not mad at you, just Westphalian.