Search found 46 matches

by stefan
Mon Jul 15, 2019 7:37 pm
Forum: Scratchpad
Topic: SIGGRAPH anyone?
Replies: 3
Views: 80

SIGGRAPH anyone?

Since this online place is a bit silent lately, anyone up for an offline meeting at SIGGRAPH 2019?
by stefan
Mon Sep 24, 2018 9:09 pm
Forum: Links & Papers
Topic: CUDA 10 available
Replies: 6
Views: 9831

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: 1944

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: 2874

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: 12171

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, Tools, Demos & Sources
Topic: Glitch Pictures anyone?
Replies: 81
Views: 110790

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, Tools, Demos & Sources
Topic: Glitch Pictures anyone?
Replies: 81
Views: 110790

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 7522 times
by stefan
Wed Jan 25, 2017 2:14 pm
Forum: Visuals, Tools, Demos & Sources
Topic: Implementation for Blue-noise Dithered Sampling
Replies: 26
Views: 20435

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: 8037

Re: Question about normal mapping in Ray tracingIt looks lik

mrluzeiro wrote: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 that calculation.