The most famous of MC Escher's work - finally built to add to my collection:
https://flic.kr/p/2kMYaj4Relativity-RO by Simon Liu, on Flickr
The whole Escher phase started with Rogue Bricks 101 challenge and Style It Up's Monochromatic challenge. Classic Simon I double dipped and did with Penrose Sewers.
I was never happy with the result, and created a proper Ascending Descending.
So when this round of RougeBricks 101 challenge was Monochrome, I knew I had to revisit and build Relativity. This was actually the hardest 101 build I've had to do - I built the original version - with plans of taking out structure and 'gravity building' for final photo... but it required so many iterations and had to take out some staircases and other 'hidden' sections to make this work for the final Entry!