Funny you should mention this, we have a SIGGRAPH 2017 paper on this topic. =)
We just released it online here: http://drz.disneyresearch.com/~jnovak/p ... index.html
Search found 11 matches
- Thu May 04, 2017 9:34 pm
- Forum: General Development
- Topic: Multi-wavelength free path sampling using ratio tracking
- Replies: 7
- Views: 9344
- Wed Nov 02, 2016 9:51 am
- Forum: General Development
- Topic: Question about microfacet reverse pdf and SmallVCM
- Replies: 2
- Views: 8840
Re: Question about microfacet reverse pdf and SmallVCM
As I understand the way you calculate microfacet pdf stays the same, you just call pdf function for light subpath where wi and wo are swapped. Inverse pdf calculation should be same as you do in bdpt so you can take pbrt as reference. https://github.com/mmp/pbrt-v3/blob/master/src/integrators/bdpt....
- Tue Nov 01, 2016 6:23 pm
- Forum: General Development
- Topic: Question about microfacet reverse pdf and SmallVCM
- Replies: 2
- Views: 8840
Question about microfacet reverse pdf and SmallVCM
Recently I decided to implement a simple dielectric microfacet Bsdf in SmallVCM in order to be able to validate something in my own renderer. The microfacet Bsdf I'm implementing is very simple; just a Phong normal distribution for now to keep things simple and the rest based off of Walter's "Microf...
- Fri Oct 30, 2015 9:29 am
- Forum: Visuals, Tools, Demos & Sources
- Topic: Glitch Pictures anyone?
- Replies: 81
- Views: 122815
Re: Glitch Pictures anyone?
Toxie posted one like this a while ago, I managed to reproduce the same glitch by accident!
In this case it's the photon tracing part of VCM drawing samples from Sobol in a bad way.

In this case it's the photon tracing part of VCM drawing samples from Sobol in a bad way.

- Fri Mar 06, 2015 8:41 pm
- Forum: General Development
- Topic: Defining roughness
- Replies: 6
- Views: 5721
Re: Defining roughness
If you look on page 96 of Wenzel Jakob's thesis, he talks about randomly classifying glossy surfaces as either non-specular or specular at each scattering event, probably based on the glossiness level. The particular application in Wenzel's thesis is for Manifold Exploration, but I found that a simi...
- Thu Mar 05, 2015 4:46 am
- Forum: General Development
- Topic: Some images from my renderer
- Replies: 8
- Views: 7374
Re: Some images from my renderer
Wow, very cool! Would love to see more renderings. More coming soon! I have a couple of cool things in the works. In the meantime, there's a lot more images (and also my writeups and stuff) on my development blog: http://blog.yiningkarlli.com/ How do you handle the lackered material on the chair? M...
- Tue Mar 03, 2015 7:00 am
- Forum: General Development
- Topic: Some images from my renderer
- Replies: 8
- Views: 7374
Some images from my renderer
Hello all, I've been following the ompf2 (and before that, ompf) boards for some time now, but haven't really posted aside from one or two posts a long time ago. I thought for a first "real" post, I'd share some images from my renderer, called Takua Render. I wrote Takua Render from scratch and have...
- Thu Jun 20, 2013 4:51 am
- Forum: Links & Papers
- Topic: Photon Beam Diffusion: A Hybrid Monte Carlo Method for Subsu
- Replies: 2
- Views: 5705
Photon Beam Diffusion: A Hybrid Monte Carlo Method for Subsu
New approach to SSS from Disney Research Zurich/Pixar Research
http://graphics.pixar.com/library/PhotonBeamDiffusion/
http://graphics.pixar.com/library/PhotonBeamDiffusion/
- Tue May 28, 2013 1:06 am
- Forum: General Development
- Topic: artifacts - any idea
- Replies: 15
- Views: 10392
Re: artifacts - any idea
Ah, my bad, I didn't notice that post. 

- Mon May 27, 2013 1:26 pm
- Forum: General Development
- Topic: artifacts - any idea
- Replies: 15
- Views: 10392
Re: artifacts - any idea
What friedlinguini means is the caustics in your newer render are more pronounced/brighter than before, which seems more in line with what one would expect from a complex glass model like your elephant. Is your sphere meant to be a perfect mirror though? If it is, I think you may have some weighting...