Here is simple example of an existing black and white shoe photo draped with fabric patterns.
The Fashion and textile print industry requires rarely more than 7-8 colours per print.
More colours make a screen print "commercially unaffordable" or catapults you to the price levels of Couture Brand such as Hermes YSL Dior and many more that use up to 27 screens for their silk scarve graphics. Only photo prints allow for more colours but then have a look that is not for every product and every size.It's more used for T shirts than repeat patterns.
colour matters softwaredrapingmodule