Search found 21 matches

Search found 21 matches
by playmesumch00ns
Tue Dec 18, 2007 12:30 am
Forum: Indigo General Stuff
Topic: @Nick --> Noise-Free BSSRDF Rendering On The Cheap
Replies: 2
Views: 1182

The disk-integration technique won't be any use unless nick implements the point-based method for mutliple-scattering, which I don't really see how well it would fit with MLT to be honest.
by playmesumch00ns
Mon Sep 24, 2007 10:14 pm
Forum: Indigo General Stuff
Topic: Multi layered SSS skin model
Replies: 30
Views: 12467

The various parts of the model are controlled via texture maps, i.e. there is a diffuse map, and then a reflection map and transmittance map for each layer to define the amount of reflection/transmittance, so this isn't an SSS procedural it's SSS using maps. Actually I don't think that's correct at...
by playmesumch00ns
Wed Jun 27, 2007 5:11 am
Forum: Indigo General Stuff
Topic: Exit portal tests
Replies: 41
Views: 7147

... and I think it was implemented in finalRender long before fryRender too :)
by playmesumch00ns
Sat Feb 24, 2007 3:47 am
Forum: Indigo General Stuff
Topic: Questions about nk data files
Replies: 1
Views: 945

Do you need to understand the file for that? Anyway, I found the information somewhere on the internet (can't remember where now). Basically it goes like this. The first line contains information about the data in the file. All the other lines are the n and k coefficients, pairwise. on the first lin...
by playmesumch00ns
Thu Feb 15, 2007 2:16 am
Forum: Works in Progress
Topic: Skin test
Replies: 37
Views: 7099

The paper uses an approximation to unbiased SSS, but the approximation is reasonably accurate, so the rendering methods are actually very similar. I was talking about the way you handle light transmission at the air/skin interface more than the scattering behaviour once light has entered the skin :)
by playmesumch00ns
Thu Feb 15, 2007 2:14 am
Forum: Works in Progress
Topic: Another SSS Test
Replies: 28
Views: 7361

About 1.4 i think. Greasy water basically ;)
by playmesumch00ns
Tue Feb 13, 2007 10:05 pm
Forum: Works in Progress
Topic: Skin test
Replies: 37
Views: 7099

Remember that the paper's using a very different rendering method. In theory everything should work the same (just mlt will be a lot slower), but there will be some differences in look due to the way the materials are set up. ryjo, it might be a better idea to use a 3-point lighting setup with a hot...
by playmesumch00ns
Tue Feb 13, 2007 10:00 pm
Forum: Indigo General Stuff
Topic: Tonemapping GUI
Replies: 15
Views: 3427

What would be really cool is if you had direct rendering to that gui with an image catalogue and some other basic image processing operations (exposure, contrast etc)... oh and do it on the gpu too!
by playmesumch00ns
Thu Jan 18, 2007 6:13 am
Forum: Indigo General Stuff
Topic: Some more absorption and scattering coefficients
Replies: 4
Views: 1224

Multiply by 1000 to put in units of m^-1 which indigo uses. by 'g', i mean the asymmetry parameter of the Henyey-Greenstein phase function, e.g. amount of forwards or back scattering. But perhaps these are all uniformly scattering media? Jensen states in the paper that the dipole approximation assu...
by playmesumch00ns
Sat Jan 06, 2007 1:58 am
Forum: Off Topic
Topic: real time GI -> fantasylab
Replies: 2
Views: 1737

I believe they're using the technique described in GPU Gems II. Pixar recently implemented this in prman for production-quality rendering, and it is very, very fast. Not accurate at all tho :) That second video is from a paper at last year's siggraph. It's not really GI, more a clever way of doing a...
by playmesumch00ns
Thu Dec 21, 2006 12:14 am
Forum: Indigo General Stuff
Topic: [I-0.6] About RGC: the noob's way for an How To
Replies: 6
Views: 1874

Could this not be done trivially in a shader within indigo? It would save the hassle of having to preconvert your textures all the time.
by playmesumch00ns
Thu Nov 16, 2006 12:46 am
Forum: Indigo General Stuff
Topic: Fireflies
Replies: 7
Views: 2776

Fireflies are just an artifact of monte carlo sampling. Where you get a high value from a direction with a low pdf you'll get a firefly... There was a solution posted here a while ago: render two images, then combine them with a "min" operation, i.e. for each pixel take the minimum value from the tw...
by playmesumch00ns
Tue Nov 14, 2006 6:44 am
Forum: Indigo General Stuff
Topic: Coding indigo
Replies: 16
Views: 3976

An even better solution would be to have a display driver interface. Then each platform could have its own implementation that would be loaded as a plugin...

If you want any help with implementing that or general os-independent porting, nick, just ask....
by playmesumch00ns
Thu Oct 05, 2006 2:57 am
Forum: Indigo General Stuff
Topic: Real CarGlass? What parametrs?
Replies: 13
Views: 4205

Have you modelled the windshield as it is in the real world? i.e. with thickness? I believe it's the double refractio that gives you a "normal" image through the glass.
by playmesumch00ns
Mon Sep 25, 2006 11:54 pm
Forum: Off Topic
Topic: unbiased algorithms
Replies: 13
Views: 4158

Metropolis sampling is a bit of a pig.

If you want a good grounding learn path tracing first. The best reference I know of is this book: www.pbrt.org
Search found 21 matches