Edit Layers Paint overried (and not blend)? Or some way to paint in a straight line?

I’m looking for a way to paint in a straight line.

I found out I can create a spline and use it to only change the paint map rather than the height map,
but since I’m using Edit Layers it exist on it’s own layer, and it will blend with the other layer.
However, I need it to override and not blend.

How can I make an edit layer override the paint on another layer and not blend then?