I'm using Rust for MIT's 6.837 Computer Graphics course. It's my first time using Rust, so I'm still getting up to speed on the language. So far, I've built a simple GPU powered 3d renderer as the first assignment.
I hope to make a progressively enhancing stochastic ray tracer at some point, so I might post updates, and potentially try to contribute to Piston if something decent comes of it. I'm currently using the Glium library, but I might use my infinite free time to look writing Rust flavored GPU code (as described here) to make writing the GPU algorithms less painful.
I'm also using Sublime Text 3, so I might look into some ideas I had on for advanced syntax highlighting. I think that traversing Rusts AST could allow for some nice semantic highlighting to aid in debugging.