Search found 34 matches

by papaboo
Tue Mar 28, 2017 5:59 pm
Forum: General Development
Topic: Google Draco
Replies: 7
Views: 1726

Re: Google Draco

Well if it's lossy then it's irrelevant. The edgebreaker compression is lossless though. It simply compresses the topology / connectivity and I seriously doubt anyone would consider lossy topology compression. High-res-CAD-model-in, swizz-cheese-model-out would be a no go.
by papaboo
Tue Mar 28, 2017 6:00 am
Forum: General Development
Topic: Google Draco
Replies: 7
Views: 1726

Re: Google Draco

The forum isn't dead, just really quiet. Like a lion on the hunt. :) Personally I can say that Draco's in my backlog and will stay there for the foreseeable future, since it doesn't really help my shoot those precious precious rays. :) I doubt that the compression would work for on GPU memory, but i...
by papaboo
Mon Mar 27, 2017 11:55 am
Forum: General Development
Topic: Google Draco
Replies: 7
Views: 1726

Re: Google Draco

What do you mean by 'in a renderer'? As datamodel pre-/postprocessing? Or actually uploading the compressed data and decompress on the fly? (if such a thing is possible)
by papaboo
Fri Feb 10, 2017 1:28 pm
Forum: Data Sets
Topic: Benchmark data sets
Replies: 3
Views: 1067

Re: Benchmark data sets

You can find a lot of the standard scenes here http://graphics.cs.williams.edu/data/meshes.xml. I'm not aware of any generally accepted performance test. Performance depends on a lot of factors, BVH building times and quality, traversal speed, resolution, camera transformation, shading complexity, s...
by papaboo
Thu Feb 02, 2017 10:48 am
Forum: Tools, Demos & Sources
Topic: Implementation for Blue-noise Dithered Sampling
Replies: 26
Views: 4019

Re: Implementation for Blue-noise Dithered Sampling

Wouldn't it yield some improvement if the first surface the ray intersects is nearly or completely specular? In that case the noise-buildup doesn't really start until the second intersection.
by papaboo
Tue Jan 24, 2017 8:15 am
Forum: Tools, Demos & Sources
Topic: Implementation for Blue-noise Dithered Sampling
Replies: 26
Views: 4019

Re: Implementation for Blue-noise Dithered Sampling

Thanks. I will definitely have a look at that. I'm currently using an LCG and that's fast but it doesn't take a lot of high frequency phenomena to break convergence. Do you have any rendering results?
by papaboo
Wed Jan 11, 2017 6:39 am
Forum: General Development
Topic: PBRT-v3 (the book) wrong microfacet BTDF?
Replies: 3
Views: 1113

Re: PBRT-v3 (the book) wrong microfacet BTDF?

You can try posting that to the pbrt google group. Matt is generally quite active in there and happy to answer questions and confirm and fix bugs.

https://groups.google.com/forum/#!forum/pbrt
by papaboo
Wed Dec 07, 2016 7:15 am
Forum: General Development
Topic: Confused about near-specular reflection that is not energy conserving.
Replies: 4
Views: 1318

Re: Confused about near-specular reflection that is not energy conserving.

Regarding 2. You should never tweak your BRDF based on the light source type. That's a slippery slope. You wouldn't expect your material properties to chance based on what environment its in. Now, your BRDF is going to return values above one in some cases, which as Friedlinguini points out, is okay...
by papaboo
Fri Jul 15, 2016 11:50 am
Forum: Visuals
Topic: Glitch Pictures anyone?
Replies: 74
Views: 72110

Re: Glitch Pictures anyone?

It is, but then he wouldn't have rendered a glitch picture. :)
by papaboo
Thu Oct 01, 2015 12:13 pm
Forum: General Development
Topic: Separate GPU compute kernels vs. a single GPU kernel
Replies: 10
Views: 6518

Re: Separate GPU compute kernels vs. a single GPU kernel

Well that does make profiling a bit tricky. ;) Volume rendering and surface rendering can still use more or less the same primitive operations as in OptiX though as far as I remember. See Wenzel Jakob's thesis for the specific. But I haven't tried out volume rendering yet though, so my memory might ...

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