Hey there!
To begin with I would like to say I am quite a beginner when it comes to Substance. I've been working with it for roughly a year now but I never encountered the problem I have right now.
So, whenever I draw in my mask it only removes color, but I can't add any. That little sphere showcasing what the material is going to look like has turned black in all my masks. I made sure that I am in drawing mode and not accidentally in the eraser mode. One of my layers for example is completely red, but when I try to draw in more red color on the surface, it only removes the color I had painted on before.
I have reinstalled the software multiple times. The problem started yesterday and after turning on and off some of the masks (at that point I was really desperate) it suddenly started to work again. But today, about half an hour into my session, it stopped working again.
Thank you for your help.
Kind regards,
Dean