Search found 6 matches
- Fri Aug 23, 2013 5:05 pm
- Forum: General Development
- Topic: Dielectric BRDFs
- Replies: 6
- Views: 5342
Re: Dielectric BRDFs
I should clarify; the problem isn't energy conservation. It's finding a balance between specular and diffuse reflection. I realize that the Phong model isn't exactly physically based, but what's a good balance between them? Isn't it angle-dependent? Also, I'm trying to premultiply any Fresnel coeff...
- Thu Feb 21, 2013 9:53 pm
- Forum: General Development
- Topic: Volume Transmittance in Heterogeneous Media
- Replies: 6
- Views: 4963
Re: Volume Transmittance in Heterogeneous Media
Secret sources tell me that the first author is in league with dark forces and that the algorithm might be verbal inspiration by Satan himself :twisted: But that's surely no excuse for a badly written paper. Let's try an exorcism. The idea behind the algorithm is to only create starting points for t...
- Sat Aug 11, 2012 2:40 am
- Forum: General Development
- Topic: MLT - how difficult is it?
- Replies: 11
- Views: 7760
Re: MLT - how difficult is it?
the course notes and slides will be featured on https://sites.google.com/site/qmcrendering/
it's still in the process of being put together, but I would guess you should see things appearing there in the next two weeks
it's still in the process of being put together, but I would guess you should see things appearing there in the next two weeks
- Fri Jun 29, 2012 10:09 pm
- Forum: Visuals, Tools, Demos & Sources
- Topic: Some clouds
- Replies: 9
- Views: 12700
Re: Some clouds
yeah, clouds! this is far more on the physical side than the stuff I do for clouds (I basically only create "artistic" procedural volume data that is evaluated on the fly in my volume path tracer). Thanks for sharing, it gave me a few interesting pointers to more material on the topic!! Clouds are a...
- Thu Jun 21, 2012 7:20 pm
- Forum: Visuals, Tools, Demos & Sources
- Topic: Glitch Pictures anyone?
- Replies: 81
- Views: 122578
Re: Glitch Pictures anyone?
numerically unstable cloud layer intersection


- Thu Dec 22, 2011 9:59 am
- Forum: General Development
- Topic: Preetham Sun, spectral rendering
- Replies: 15
- Views: 11790
Re: Preetham Sun, spectral rendering
a) be careful about the sun radiance data in Preetham paper, I think of by a factor (10 times too low if I remember correctly) w.r.t. the units cited in the paper. Compare it to other sources. b) In general I recommend "Wyszecki & Stiles - Color science", if you can gain acces to that book. For the ...