This was so helpful, but everytime I use the shape builder tool to colour in an area it take 10 seconds to colour, showing a progress bar each time. Do you know how to solves this and make it a quicker process?
I'm having the same issue when I try to apply this to my own drawings. It takes about a minute or longer before the color appears (and a message saying that a shape is formed). Maybe has something to do with the amount of anchor points? It would be great if you would have any advise, Dan!