Image Paint

I would like to add a function to enable/disable cast drawing like C4D paint. At present, drawing in paint does not work well and brushes do not work well. I would like to have a layer function like Ps, where layers can be combined and duplicated with the function of color adjustment, and these functions can be used as more straightforward buttons. I hope the design of the Paint panel can refer to the paint effect of C4D. Once the Image Paint panel model is in edit mode, it will not work. This seems to be a BUG