This is bizarre, nothing has changed in my brush or other setting while painting the mask. After painting the mask for perhaps 10 minutes, I find that earlier masking has faded. I’m using a wacom tablet, but have tried it with a mouse, and I get the same effect. It does not appear to be related to stopping (releasing the CTRL key and L - mouse button, or picking up the pen) and starting again.
Does anyone know why my mask masking would fade over time?



