Search found 22 matches

by Thammuz
Fri Nov 23, 2012 9:57 pm
Forum: General Development
Topic: Avoiding correlation patterns in Sobol sampling?
Replies: 5
Views: 5244

Re: Avoiding correlation patterns in Sobol sampling?

Thanks for the help Toxie, but for the moment my conclusion is that http://cdn.memegenerator.net/instances/500x500/30693862.jpg So, until I've waded through what seems to be the required heap of papers required for one to properly generate proper sequences across threads, I'll take a break from them...
by Thammuz
Mon Nov 19, 2012 10:01 pm
Forum: General Development
Topic: Avoiding correlation patterns in Sobol sampling?
Replies: 5
Views: 5244

Re: Avoiding correlation patterns in Sobol sampling?

Thanks for your suggestions, they really helped me, and I now have an implementation that both converges super fast and that has an acceptable correlation pattern that doesn't interfere between threads. It also gives good results even for the most pathological test scenes that I have. I basically sw...
by Thammuz
Sat Nov 17, 2012 9:35 pm
Forum: General Development
Topic: Avoiding correlation patterns in Sobol sampling?
Replies: 5
Views: 5244

Avoiding correlation patterns in Sobol sampling?

Hi, I recently started using Sobol sequences for sampling, and I was quite blown away of how they improved convergence speed...truly mind blowing. That said, I do have some questions. 1. The correlation patterns are quite heavy in the beginning and I find them quite distracting (they disappear compl...
by Thammuz
Wed Nov 07, 2012 6:24 pm
Forum: Links & Papers
Topic: Ph.D. thesis
Replies: 21
Views: 24741

Re: Ph.D. thesis

Crongratulations!
by Thammuz
Wed Jan 11, 2012 5:48 pm
Forum: Visuals, Tools, Demos & Sources
Topic: A couple of renderings
Replies: 10
Views: 11197

Re: A couple of renderings

The greyish color behind the robot woman is due to a grey plane behind her.
by Thammuz
Wed Jan 11, 2012 1:23 pm
Forum: Visuals, Tools, Demos & Sources
Topic: A couple of renderings
Replies: 10
Views: 11197

Re: A couple of renderings

Thanks! Yes, I use a binned spectral color representation internally (Smits), but I'm not too happy about the binned approach so I'm planning on implementing stratified wavelength clusters instead, or go for a single random wavelength approach. All images use planar (mesh) emitters, with rgb colors ...
by Thammuz
Sat Dec 31, 2011 2:08 pm
Forum: Visuals, Tools, Demos & Sources
Topic: Flying over the stained glass mountains
Replies: 4
Views: 5486

Re: Flying over the stained glass mountains

Awesome! I love the mood in the video.
by Thammuz
Wed Dec 21, 2011 8:26 am
Forum: Visuals, Tools, Demos & Sources
Topic: A couple of renderings
Replies: 10
Views: 11197

Re: A couple of renderings

@beason After a test render with no mlt I noticed that the (flat) background cleared up quickly, whereas the plastic/metal highlights didn't, so I figured that in the end a lot of samples would be wasted on the background (which doesn't have too much visual importance). So, I decided to use mlt just...
by Thammuz
Tue Dec 20, 2011 6:49 pm
Forum: Visuals, Tools, Demos & Sources
Topic: A couple of renderings
Replies: 10
Views: 11197

Re: A couple of renderings

Thanks & thanks! @fursund Hm, the earphones image cleared upp extremely quickly, so it looked good within 5-10 minutes, but I let it run for about 30 minutes or so just just to get it a tad cleaner. The trumpet image took 3-4 hours, mainly to clear out the glossy reflections on the front part of the...
by Thammuz
Tue Dec 20, 2011 10:34 am
Forum: Visuals, Tools, Demos & Sources
Topic: A couple of renderings
Replies: 10
Views: 11197

A couple of renderings

Not too much going on in the visuals section, so I thought I'd some images I've rendered recently, with my renderer. Simple unidirectional path tracing for the trumpet and the earphones, and pathtracing with mlt for the robot girl. I want to be clear though, that the model's weren't done by me. I go...