Example: I have a vector layer and a triangle on a separate vector layer (visual). I want to use this triangle as a mask so that it OCCLUDES the contents of the first layer.
In Pixelmator you could do this by adding a white mask (default) and painting a black triangle on it.
I know I could create a vector rectangle that covers the whole canvas and subtract the triangle from it, then use that as the mask (visual), but is there a simpler way? Especially because when I use a compound as a mask, I cannot edit it without removing it as a mask, changing it and adding it as a mask again.