Search found 382 matches

by spectral
Thu Jan 26, 2012 7:08 am
Forum: General Development
Topic: Dissapointing building times from lbvh gpu based builder
Replies: 35
Views: 28429

Re: Dissapointing building times from lbvh gpu based builder

Great,

And how does it peform on ATI GPU , no problem with the barriers ?
by spectral
Wed Jan 25, 2012 8:15 am
Forum: General Development
Topic: Dissapointing building times from lbvh gpu based builder
Replies: 35
Views: 28429

Re: Dissapointing building times from lbvh gpu based builder

It seems interesting... I will give a try too implement a high quality BVH builder in OpenCL too.

You say that you have implemented it in OpenCL and CUDA, why both ? Do you have encounter some performance difference between CUDA and OpenCL ? Have you been able to use the HLBVH on the CPU too ?

Thx
by spectral
Wed Jan 18, 2012 11:22 am
Forum: General Development
Topic: Dissapointing building times from lbvh gpu based builder
Replies: 35
Views: 28429

Re: Dissapointing building times from lbvh gpu based builder

This has nothing to do with this thread, but: I am getting really bored by the words "physically correct" - Feynman is probably laughing really hard whenever graphics folks say that - shouldn't we all switch to "physically based", "physically inspired" or "statistically correct" instead? I agree......
by spectral
Mon Jan 16, 2012 3:03 pm
Forum: General Development
Topic: Dissapointing building times from lbvh gpu based builder
Replies: 35
Views: 28429

Re: Dissapointing building times from lbvh gpu based builder

Seems interesting even if I have not read the paper (not yet... but hope during the next months). But, I have a question... it seems that the best BVH construction algorithm remain the SBVH, I'm talking about offline renderers (please, tell me if I'm right or not) and high quality BVH. But all these...
by spectral
Thu Jan 12, 2012 7:55 am
Forum: Links & Papers
Topic: Random Parameter Filtering
Replies: 4
Views: 5585

Re: Random Parameter Filtering

Here is the article I was talking about, it is a related subject :

Temporal Light Field Reconstruction for Rendering Distribution Effects : http://groups.csail.mit.edu/graphics/tlfr/

And the code is provided ;-)

Keep us informed of your progress ;-)
by spectral
Wed Jan 11, 2012 2:08 pm
Forum: Links & Papers
Topic: Random Parameter Filtering
Replies: 4
Views: 5585

Re: Random Parameter Filtering

You can also use the Dade's SLG code http://src.luxrender.net/luxrays/ The simplest is to use a framebuffer with all the data, load the data from a file and then apply your algorithm. I don't remember where but I have see the same kind of algorithm coded in CUDA and C++, but without renderer. This w...
by spectral
Wed Jan 11, 2012 1:39 pm
Forum: Visuals, Tools, Demos & Sources
Topic: A couple of renderings
Replies: 10
Views: 11505

Re: A couple of renderings

Great, Don't use "single" random wavelength approach, because you have to do several samples to obtain the right color and so it request more time ! Something you can try is to use a set of random wavelength that you choose with MLT, by example ;-) But why the background color is grey with the robot...
by spectral
Wed Jan 11, 2012 12:16 pm
Forum: Visuals, Tools, Demos & Sources
Topic: A couple of renderings
Replies: 10
Views: 11505

Re: A couple of renderings

Looks great, I like... :-)

And for the lights, do you use spectral rendering, blackbodies emitter and/or an IBL/environment light ?
by spectral
Mon Jan 09, 2012 5:33 pm
Forum: ompf2
Topic: Vote for a new domain name for your favorite forum!
Replies: 32
Views: 34796

Re: Suggest a new domain name for your favorite forum!

I agree,

"renderdev" will be great, because :
- render : it is more generic than "ray", "photon" etc... it can be applied to any kind of rendering techno, like game related one.
- dev : because, finally... it is the goal :-)
by spectral
Mon Jan 09, 2012 3:17 pm
Forum: General Development
Topic: AVX perf on dual sandy bridge
Replies: 5
Views: 7183

Re: AVX perf on dual sandy bridge

Interesting :-)

So, I have a few questions too :
- How many CPU do you have ? Is it on only 1 i7 CPU ?
- Which frustrum based BVH technique have you used ? Is it something equivalent to the Kirill Garanzha paper ?
- Have you test several scenes for coherent and incoherent rays ?

Thx & congrats