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1 HN recommender · recommended in 5 months, 2014–2018
2:13 · 439K views · Mar 28, 2014
A short preview of OTOY's Brigade 3.0 engine doing real-time path tracing, running on two GTX Titans.
HN cites it as the example of real-time GPU path tracing, noting its noise problem.
6 comments from Hacker News
What UE4 can do is very impressive. But when it comes to real time photo realism I think path tracing is even more impressive. For example this Brigade 3.0 demo: this video
In case anyone has about 30-60 minutes and is interested to get a quick glimpse of how easy (I guess meaning free and accessible at the least) it has become to do such graphics: - Download and install Blender 2.71 ( [LINK] ). On linux (Ubuntu) I did not even have to install it; I just extracted the tarball and ran the blender binary. - Go through this two part ceramic mug tutorial (30-60 minutes): [LINK] ... [LINK] As someone who does not have graphics training, I was blown away when I did this. Apparently there is this thing called 'path tracing' based rendering, that takes care of accurate lighting, as long as you give the correct specification of geometry and materials. Some interesting videos: - Octane 2.0 renderer: [LINK] - Lightwave: [LINK] - Brigade 3.0: this video - Alex Roman, the third and the seventh: [LINK] Brigade is an effort towards real-time path tracing, and it's predicted that within 2-3 GPU generations, such graphics would be possible in games.
I wonder what convolutional neural networks bring to the table. Maybe you could use them to get rid of the noise, or then you could use ray tracing for the base image and train a CNN to "recolour" that image based on a noisy path traced one of the same scene. This demo is 4 years old, but the noise still seems to be a problem: this video If anybody's got more recent impressive demos to link, I'd like to see how things have been developing.
Yup, both of them take at least 1-2 seconds to respond to mouse movements. Could you do WebGL and blend into ray-traced? Have you seen what Octane/Brigade (not exactly same tech, but close) can do in realtime? this video (you probably have) Anyways, Brigade is coming to cloud as well on AWS GPU instances, so it would probably be easy for you to just use their solution integrated within your modeling tool then.
well you COULD use OpenCL to "control every pixel". Here's an example of path tracing in "realtime" (ok, it's not quite there yet) on the GPU. this video check out this blog too: [LINK]