At various Los Angeles theme parks I’ve seen artists use a larger black “rubber” pad. Is that what you’re using? From my understanding, these black pads are used to add “bounce” to the pressure of the tools applied. I know someone’s going to recommend just adding more paper for the same purpose, but I’ve been searching for these 18”x24” pads. The closest thing I’ve seen are “signing pads” used at stores when you’re closing out a check by the register. I’ve asked employees at these stores and caricature artists what those pads were and how to get them, but all have said they didn’t know. Any leads?
You know what...you should get with a developer and develop an APP that does exactly this...a training device where you place the balls and then draw based on placement. This is a great idea.