Masking graphics with other graphics

[heyarne]

I'm trying to mask graphics with other graphics
The code is basically this:

(defn draw [state]
  (q/background 255)
  (let [mask (q/create-graphics (q/width) (q/height) :p3d)
        drawing (q/create-graphics (q/width) (q/height) :p3d)]
    (q/with-graphics mask
      (q/background 255))
    (q/with-graphics drawing
      (q/no-stroke)
      (q/fill 200)
      (q/with-translation [(* 0.5 (q/width)) (* 0.5 (q/height))]
        (q/rect 0 0 100 100)))
    (q/mask-image drawing mask)
    (q/image drawing 0 0)))

Since I'm builing a mask completely white mask I would have expected whatever I draw on the second graphics to be fully visible, but it's not. The result is a canvas containing only what I draw with the very first q/background. Why? What am I missing? I tried different renderers because I read the docstring of q/mask-image as this being a possible issue but that didn't change anything.

[Jeiwan]

This is still an issue. A workaround is to use .mask method:

(.mask drawing mask)