Search found 45 matches

by stefan
Mon Sep 24, 2018 9:09 pm
Forum: Links & Papers
Topic: CUDA 10 available
Replies: 6
Views: 1637

Re: CUDA 10 available

I would think the RTX cores are exposed the same way as the rasterisation hardware - through graphics APIs, but not general compute APIs. Note how there's no access to ROPs from CUDA or OpenCL, I guess the same goes for RT.
by stefan
Thu Aug 23, 2018 12:43 pm
Forum: Links & Papers
Topic: Claims of real-time Ray Tracing on mobile hardware
Replies: 2
Views: 853

Re: Claims of real-time Ray Tracing on mobile hardware

Can't say anything about this group in particular. But I'm expecting RTRT on mobile at some point, as Apple's current public betas have an API to do ray tracing on mobile via Metal.
by stefan
Fri Aug 03, 2018 10:52 am
Forum: Links & Papers
Topic: Importance Sampling of Many Lights with Adaptive Tree Splitting
Replies: 7
Views: 1349

Re: Importance Sampling of Many Lights with Adaptive Tree Splitting

Here's another similar incarnation: http://cgg.mff.cuni.cz/~jaroslav/papers ... stract.pdf
I'd have to search, but I saw the iRay team also describing a light BVH with probabilistic traversal that seemed to also go off the same idea.
by stefan
Tue Jul 11, 2017 9:21 am
Forum: General Development
Topic: MIS with IBL
Replies: 14
Views: 9135

Re: MIS with IBL

Obviously, some parts of the scene benefit more from lights than the skydome. So, I want to change the probability of sampling the light or the sky depending on potential contribution. So I evaluate a random point on the skydome (importance sampled) and a random point on a random light. Based on th...
by stefan
Fri Feb 10, 2017 12:04 pm
Forum: Visuals
Topic: Glitch Pictures anyone?
Replies: 75
Views: 99280

Re: Glitch Pictures anyone?

Lesson learnt: When you want all threads in a warp to participate in a memory fetch (see Tony Scudiero's GTC presentation "Memory boot camp III"), first make sure all threads are active.
by stefan
Tue Feb 07, 2017 9:39 pm
Forum: Visuals
Topic: Glitch Pictures anyone?
Replies: 75
Views: 99280

Re: Glitch Pictures anyone?

How to not optimise CUDA BVH traversal.
Screen Shot 2016-06-03 at 13.55.15.jpg
Screen Shot 2016-06-03 at 13.55.15.jpg (179.11 KiB) Viewed 5915 times
by stefan
Wed Jan 25, 2017 2:14 pm
Forum: Tools, Demos & Sources
Topic: Implementation for Blue-noise Dithered Sampling
Replies: 26
Views: 16020

Re: Implementation for Blue-noise Dithered Sampling

Thanks for sharing this. I have a Python version floating around somewhere, but that was painfully slow and then other priorities kept me from working on it.
by stefan
Wed Jul 15, 2015 1:48 pm
Forum: General Development
Topic: Question about normal mapping in Ray tracingIt looks like al
Replies: 7
Views: 6981

Re: Question about normal mapping in Ray tracingIt looks lik

I believe "bump map" and "normal maps" are different things. They're almost the same. They contain the same information, only in different format. A bump map contains height values that a render engine can use to calculate new normals from. A normal map contains the result of th...
by stefan
Fri Jul 03, 2015 3:02 pm
Forum: General Development
Topic: pbrt-v3 source code now available
Replies: 23
Views: 21444

Re: pbrt-v3 source code now available

Spring 2016? I guess I have the code as bedtime reading material until then. ;)

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