I’ve worked hard this week end, and finally updated this filter with some new options :
-
Input typelets you choose between “Single opaque shape over transparent background” or “Multiple colored shapes over transparent background”, which is clear enough I think
- Added parameter
Output asto be able to generate z-map or normal maps.
Some screenshots:

Original image.

With ‘Input type’ → ‘Single opaque shape’

With ‘Input type’ → ‘Multiple colored shapes’

With ‘Output as’ → ‘Normal map’