Thought this group would be interested in the 3D printing design challenge we just posted. It's hosted by Stratasys and offers over $16,000 in prizes.
This challenge allows for you to utilize GrabCAD Print to prepare a model that utilizes the multi-material capabilities of the Stratasys J750 to produce something realistic.
You can check out the Challenge here - https://grabcad.com/challenges/make-it-real
They are really looking for some creative submissions that utilize multi material and multiple colors to show realism in their model. I think this Group should have more than enough capable people to compete!
Here is an article on the challenge as well - https://www.fabbaloo.com/blog/2019/1/9/make-it-real-challenge-is-open-for-impactful-3d-print-design