Your thoughts on and comments to Volume Rendering in Unreal Engine 4.

[dokipen (Dan 'dokipen' Elliott)]

@dpenney;578936

I think you should try to do some experiments with straight ray marching, just for comparison. In my tests, I got nicely convergent renders with a 970 + Vive @ ~1.2ms GPU time, and some overhead for rendering the cloud shell into custom depth (.3-.4ms). There isn’t much CPU overhead. This is with 25 samples per ray and my dense clouds with a 3d texture that is 950x950x600. If you weren’t running in VR, or didn’t have a massive amount of other stuff going on like we did, you could really bump up the sample count, and add a ton more complexity.

Yeah I think you are right. Once I’ve finished up the slicing BP I’ll get to work on the precomputed shadows and add that into my existing raymarcher. Having the shadows from houdini baked would make it super fast. also would love to see the 3d texture code. 25 samples is nothing! I suppose because it is dense then you can have a smaller stepping because it’s more likely going to early exit due to density. Now just need to magic up some spare time.