This is my next attempt at the Penrose triangle, I was not satified with the first result that was not symmetric.
I've also posted a tutorial on how to generate this shape with Inventor on my blog: http://wp.me/p3gI7M-4I
Printed at 200% nicely with Kisslicer on a 3d touch:
- Rought support (0.5mm gap, I just neede a small skrewdriver to pop)
- PLA / 195deg with fan ON / 0.25mm / 2 shells