Regarding the mask paintbrush

[POPOLOPO]

Hello everyone

First post here! Just started Affinity this week, so far so good, but I'm still learning.
I have a mask on a layer. Everytime I choose the white color and go over my image, it brightens up my layer, any idea why and how to avoid it?

Many thanks !

[GarryP]

Welcome to the forums @POPOLOPO

Painting with white onto a mask ‘lets the light (background) through’ the image where you have painted.
I suspect that you might have painted white but with a not-fully-opaque brush onto the mask (can also happen if you have set the colour of the brush to something that isn’t 100% opaque but that doesn’t seem to be the case in your screenshot).
This would mean that the brushed parts of the image look ‘lighter’ because they have been made partly-transparent and the white background is showing through (try putting a coloured rectangle directly under the image layer to see).
Try changing the brush to something more solid and see what happens.

[carl123]

You do not have just the mask layer selected in the Layers panel; you have the layer selected as well

Click specifically on the mask layer and you will see how the highlighting of those 2 layers changes then try again

[POPOLOPO]

Hello @GarryP

Indeed, I was painting with 235 white instead of 255 🥲

@carl123 I clicked on the layer for the screenshot only, before that I was on the mask so no worries on this side 🙂