looking for "bump"-like effect in synfig

Hello.

I’d like to add some volume variations to the attached cookie… to have the cinnamon bits pop out.

Is there any way I could simulate the use of a noise layer (or other texture) as a bump map in synfig? I tried to play with multiply, hard light and a few other settings but could not find a satisfactory result.

any idea?

thanks!
B.
cookie.sifz (4.32 KB)

See eroded metal from examples folder (wallpaper.sifz)
-G

very useful example, thanks!