Hey there I have a client who wants 3d printed tokens for his tabletop game he is making and he wants cracks on them, so I thought could I use Substance Painter to do that with just a height map like so...
Technically, yes. Just enable the brush at the top near the material. This would be the one time where you will need to increase the detail slider as far as it goes to try and get as much of the detail from the image of the crack as possible to transfer over to the model.
Would still be just as simple to actually sculpt in the cracks yourself.