Existing texture is not changing

[markw]

The lighter strokes look like they are on another layer?
But assuming it is all on the same layer and all you did was change the colour of the paint, then it should have interacted with the first strokes laid down? There also doesn’t appear to be any obvious bleeding of the second colour into the first?
Knowing what all the brush settings are though might help to understand what’s happening. Are you able to post the brush in question here?
Swapping to other Custom Brushes, do they behave correctly?

[cinematik]

markw, already fixed it, it was some combination of settings in the texture group.