To me this appears to be royal icing on black fondant, but I would do it by cutting out the different colors from gum paste and building the 2-D figure. The black lines I would paint with edible colors. It would need to be done several days...maybe even a week...in advance to allow plenty of drying time. Same with the trees. This is the method I used to do Mickey.
The pic you offef shows color flow (run-out). That's what I would do but Sandra uses gp a lot so naturally she would think of that :) To me that would make it unedible - yes it is edible but almost no one would eat it whereas color flow is a little more edible IMHO. The background green trees?leaves? are fondant cutouts probably.
LOL - @kakeladi , I think the RI is actually prettier, but I am afraid of it!
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