Yes, isbeorn is correct. The screens above were taken from a small OpenGL testbed that I have running on my machine in order to test shader stuff before it gets integrated into the game - the disco lights are simply because I put random colour values in for testing.
Everything about this system is geared towards performance - were it 'just' a case of the cosmetic effects of marginally nicer lighting then frankly, this would be an incredibly low priority task but it isn't. The performance issues are a big problem and we certainly wouldn't want to release a Steam version which had glaring performance issues, early access or not, in the same way that we didn't want to update the Desura build until that build was reasonably stable.
CaptainBinky
Andy joined
One-quarter of The Indie Stone.