Opportunity is missed by most people because it is dressed in overalls and looks like work. - Thomas Edison
Are there any other garment templates in the making, such as l/s, hoodies polos etc?
If you want to get fancy and use illy and photoshop, I use a smart layer for the art portion on the mock-up. This allows you to place the art (from illy) in at full size. If the customer changes their art, I update the illy file and the mock-up changes as well.
Haha, literally JUST got done mocking one up using gradients in PS, took a while to get it to really look right, and it isn't really repeatable quickly. Would love to just be able to toss some textures on a design instead. I've ALMOST gotten out the strobe flashes and actual foil and my nice camera and gone to town, but I really just don't have the time with the new baby etc.
Since youre offering, foils/glitters/shimmers are a pain to mockup well and I havent ever come across a quality pack with those "textures". I would be all over something like that.