Search found 171 matches

by alpistinho
Wed Mar 06, 2019 12:03 pm
Forum: Development
Topic: Quasirandom sampler
Replies: 44
Views: 20623

Re: Quasirandom sampler

Now you have to establish if it is of any use :mrgreen: Does it converge faster than Sobol sampler (i.e. less noise in the same amount of samples) ? P.S. people will endless complain about patterns at the start but it may be still of some use if it is noticeably better than Sobol. I still think the...
by alpistinho
Wed Mar 06, 2019 11:55 am
Forum: Development
Topic: Quasirandom sampler
Replies: 44
Views: 20623

Re: Quasirandom sampler

I think it is converging to the right solution now. It also helps when you don't calculate the same constant every time =p
Screenshot from 2019-03-06 08-54-13.png
by alpistinho
Wed Mar 06, 2019 11:42 am
Forum: Development
Topic: Quasirandom sampler
Replies: 44
Views: 20623

Re: Quasirandom sampler

Things are looking better, but there are plenty of visible patterns indeed for now.
Screenshot from 2019-03-06 08-41-10.png
by alpistinho
Wed Mar 06, 2019 11:27 am
Forum: Development
Topic: Quasirandom sampler
Replies: 44
Views: 20623

Re: Quasirandom sampler

I had understood that it would be called every time the samples would be calculated and subsequent calls for GetSample would always return the same result until a new RequestSample was called. I am reading the Sobol code to understand how it is done over there and it appears to me that what prevents...
by alpistinho
Wed Mar 06, 2019 2:41 am
Forum: Development
Topic: Quasirandom sampler
Replies: 44
Views: 20623

Re: Quasirandom sampler

Hi, Thanks for the directions, I think I understand how it should work now. It is still not working and it seems that the RequestSamples method is called at the beginning and not called again, so the samples are always the same. I will have a look at this tomorrow. About something tangentially relat...
by alpistinho
Tue Mar 05, 2019 2:51 pm
Forum: Development
Topic: Quasirandom sampler
Replies: 44
Views: 20623

Re: CGI tech news box

Sure, it's here: https://github.com/Alpistinho/LuxCore on the r2_sampler branch.

To use the sampler just put R2 in the configuration file.
by alpistinho
Tue Mar 05, 2019 2:17 pm
Forum: Development
Topic: Quasirandom sampler
Replies: 44
Views: 20623

Re: CGI tech news box

Hi, As expected the result does not converge to the right output. So, I was investigating and I have at least a couple of questions about the Sampler interface: 1. The GetSample method can return 3 different values based on how it is called. If the index is 0 or 1, the value returned is sample0 or s...
by alpistinho
Tue Mar 05, 2019 12:34 am
Forum: Development
Topic: Quasirandom sampler
Replies: 44
Views: 20623

Re: CGI tech news box

Have you tried to run the rendering for a very loooong time ? It may be just the samples correlation I was talking about. Plain Sobol, without shuffling looks similar. I will try that, but I am not confident. I was expecting the patterns to be more like this: https://www.shadertoy.com/view/4dtBWH B...
by alpistinho
Mon Mar 04, 2019 8:40 pm
Forum: Development
Topic: Quasirandom sampler
Replies: 44
Views: 20623

Quasirandom sampler

The Unreasonable Effectiveness of Quasirandom Sequences "I present a new low discrepancy quasirandom sequence that offers substantial improvement over current state-of-the art sequences eg Sobol, Niederreiter,…" http://extremelearning.com.au/unreasonable-effectiveness-of-quasirandom-seque...
by alpistinho
Mon Feb 25, 2019 6:23 pm
Forum: General Discussion
Topic: Old reprositories or setups
Replies: 3
Views: 3348

Re: Old reprositories or setups

The sketchup plugin is available at: https://bitbucket.org/luxrender/su2lux

You can download it and install on the plugins folder as it would be done with any other plugin installed directly from source. You could also go to he old forums and grab the release there: www.luxrender.net/forum