- Create a new sprite
- draw something
- create a new layer
- change the transparency of the newly created layer
- duplicate frame (alt+n)
- move the content of the new frame to the transparent layer so that each frame use different layers (with different transparency) but with the same content
- export a sprite sheet (with “merge duplicates” activated)
Expected result: a sprite sheet with two sprites with different transparency values
Actual result: a sprite sheet with one sprite