i had that problem for a long time too. i just stopped using blending modes and now i paint over the sketch at like 50% opacity and layer it up. Iโm bad at explaining but this timelapse should show what I mean
wakey wakey Mocha! it's been a while!!
I've been over on my NSFW account building up an audience, but with the opening of my new Patreon I'm combining the two into one place!! I'll be drawing SFW content again and returning to Coffee Beans Cafe. I miss coffee cat :')