Thought I'd contribute. I managed to recreate stacking and wrinkles after washing by using following method:
- wash normally
- after washing, I hang the wet jeans and twist/wrinkle each leg, then fix with clothes pegs (tip: hang each leg by the hem when done)
- for wrinkles (wherever): twist and wrinkle the denim into the desired shape, then fix the whole area with clothes pegs left and right (2 per area should do)
BTW: How do you get away with not washing your jeans? Any tricks? Do you do it to preserve the colour/stacking?