Well, need to run some tests, but just switching to 3D textures seems to have improved tracing time a bit. Dont exactly remember the times before, but tracing is at about 0.3 - 0.4 ms per ray at 1080p, but that’s on my new (and ) GTX 970. Need to test it on my fathers 7870 to get a more mid-range test. Plus, at that times you don’t really see much difference, overhead starts to kick in, but should improve there.
In any case, still there’s work to do, as the switch was just the first stage, the big improvement is going to be changing the sampling method.
Stay tuned!