Good evening.

I've got a question for Krita, it's kind of something I've always wondered about all artist software. Is it possible with the Brush to create strokes that don't increase Opacity?
Say I'm using a brush that has only 25% opacity, is it possible in one of the settings to make it stay at 25% and each concurrent overlapping stroke to -not- add opacity? I would find it amazingly useful on my project tonight.

Not sure what you want to achieve, but sounds like you want the "Wash" painting mode basically to apply not just to the dabs of a single stroke but across strokes?

I don't think there is a blending mode that works exactly like this right now, closest I could find is the "Greater" blending mode.
But that way you can't paint over with a different color of the same opacity.

However for altering color without affecting alpha, there's of course the "Preserve Alpha" toggle, which is very useful to tint semi-transparent parts without affecting opacity.

Yeah I believe I'm going for a wash type effect. I have a grayscale layer (over a white layer) and I want to wash all across the picture (landscape) in a uniform way, then a similar different opacity thing in other spots to try and cut down on a scribbled look. Thanks for the the preserve alpha for tinting tip its a good tip idea for my next step.