depth map stereo image: foreground gets partially overwritten by background (solvable)

[OWKenobi]

I discovered the depthmap script yesterday, and I am really impressed!

the depth-maps come out really great and are of a flawless shape!

But creating a stereo image from these seems to have a minor issue: the foreground gets partially overwritten.

Example: take a portrait of a person. On the left side of the head, the background moves to the left, so some pixels have to be "invented". This works quite well. But on the right side of the head, the background also moves to the left, partially overpainting the head, so part of the face and neck disappear - which is wrong; the background should move *behind" the head, not in front of it. (I put divergence to 9 to make it easier to see the effect; it also occurs in lower settings)

This is fixable, though; if you process images from left-to-right, just remember the height value of the last pixel you generated. Now, if a left shift occurs, and its height value on the new position is actually lower than the pixel already there, don't render it.

Hope someone is able to put this to code :-)

(example image: https://i.ibb.co/2WQpKBf/stereo-bug.jpg )