Geometric Paper Craft Forms
Great instructions and the templates were fun to experiment with. I could not print on any other paper but normal white printer paper, but transferred the form onto the final paper with the scoring tool - that worked surprisingly well and meant that I had no lines on the paper.
I used a transparent paper for the rock. That was not really easy to fold, but looks great. I will try and recreate this with a bigger size as well to have two lights next to each other.

The geometric forms are now now part of my Christmas decoration (might turn the green forms into Christmas trees :)). Unfortunately the triangle is a bit small for my electric small lights, but I will test scaling up the template and creating the same in bigger.

Thanks for the helpful instructions and great templates!