You can make imitation of buffies and folds with the help of any bleach and acryl.
For starters we slightly bleach big spots, far from stitches. We use bleach and big-size brush. Make sure you use wet fabrics to get better transitions of gradient, and vice versa, dry fabrics to get distinct lines.
Then we process the edges of the stitching.
I recommend to do it n stages, because the result is obvious only when the fabric is dry. Then we bleach approximate folds.
And, once again, we process the edges of the stitching with the small-size brush on the dry fabric.
Afterwards we mix up acrylic, pick up the darker color for the denim, set off the stitching and paint the folds.