Search found 11 matches

by yiningkarlli
Thu May 04, 2017 9:34 pm
Forum: General Development
Topic: Multi-wavelength free path sampling using ratio tracking
Replies: 7
Views: 1910

Re: Multi-wavelength free path sampling using ratio tracking

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
by yiningkarlli
Wed Nov 02, 2016 9:51 am
Forum: General Development
Topic: Question about microfacet reverse pdf and SmallVCM
Replies: 2
Views: 5133

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....
by yiningkarlli
Tue Nov 01, 2016 6:23 pm
Forum: General Development
Topic: Question about microfacet reverse pdf and SmallVCM
Replies: 2
Views: 5133

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 "M...
by yiningkarlli
Fri Oct 30, 2015 9:29 am
Forum: Visuals
Topic: Glitch Pictures anyone?
Replies: 74
Views: 73881

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.

Image
by yiningkarlli
Fri Mar 06, 2015 8:41 pm
Forum: General Development
Topic: Defining roughness
Replies: 6
Views: 2804

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...
by yiningkarlli
Thu Mar 05, 2015 4:46 am
Forum: General Development
Topic: Some images from my renderer
Replies: 8
Views: 3940

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...
by yiningkarlli
Tue Mar 03, 2015 7:00 am
Forum: General Development
Topic: Some images from my renderer
Replies: 8
Views: 3940

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 scratc...
by yiningkarlli
Tue May 28, 2013 1:06 am
Forum: General Development
Topic: artifacts - any idea
Replies: 15
Views: 5556

Re: artifacts - any idea

Ah, my bad, I didn't notice that post. ;)
by yiningkarlli
Mon May 27, 2013 1:26 pm
Forum: General Development
Topic: artifacts - any idea
Replies: 15
Views: 5556

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...

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