Comments for Work Log by Kevin Beason http://www.kevinbeason.com/worklog Latest personal graphics developments Tue, 28 Jun 2011 13:35:20 -0700 http://wordpress.org/?v=2.8.5 hourly 1 Comment on Measured reflectance by Rob. http://www.kevinbeason.com/worklog/2009/03/20/measured-reflectance/comment-page-1/#comment-201 Rob. Tue, 28 Jun 2011 13:35:20 +0000 http://www.kevinbeason.com/worklog/?p=67#comment-201 ..how can no one comment on this, this is cool. ..I'll now go back to trying to decipher it. ..how can no one comment on this, this is cool. ..I’ll now go back to trying to decipher it.

]]> Comment on Dispersion, Spectral Filtering, Subpixel Sampling by squeen http://www.kevinbeason.com/worklog/2009/06/06/dispersion-and-spectral-filtering/comment-page-1/#comment-197 squeen Thu, 24 Mar 2011 14:19:02 +0000 http://www.kevinbeason.com/worklog/?p=156#comment-197 Another question: do you get much out of using the Sunflow technique of super-sampling if you use a pixel reconstruction filter other than the box (e.g. tent filter)? Another question: do you get much out of using the Sunflow technique of super-sampling if you use a pixel reconstruction filter other than the box (e.g. tent filter)?

]]> Comment on Dispersion, Spectral Filtering, Subpixel Sampling by squeen http://www.kevinbeason.com/worklog/2009/06/06/dispersion-and-spectral-filtering/comment-page-1/#comment-196 squeen Wed, 23 Mar 2011 11:44:36 +0000 http://www.kevinbeason.com/worklog/?p=156#comment-196 About how much longer does it take to clean up the chromatic noise vs. a non-spectral render? About how much longer does it take to clean up the chromatic noise vs. a non-spectral render?

]]> Comment on Dispersion, Spectral Filtering, Subpixel Sampling by Bramz http://www.kevinbeason.com/worklog/2009/06/06/dispersion-and-spectral-filtering/comment-page-1/#comment-128 Bramz Tue, 09 Mar 2010 19:21:11 +0000 http://www.kevinbeason.com/worklog/?p=156#comment-128 So, you're still working on Pane. That's great! There's lots of stuff here I'm planning for liar as well, but you know, progress is slow =) So, you’re still working on Pane. That’s great! There’s lots of stuff here I’m planning for liar as well, but you know, progress is slow =)

]]> Comment on Dispersion, Spectral Filtering, Subpixel Sampling by Kevin http://www.kevinbeason.com/worklog/2009/06/06/dispersion-and-spectral-filtering/comment-page-1/#comment-109 Kevin Fri, 05 Feb 2010 20:11:28 +0000 http://www.kevinbeason.com/worklog/?p=156#comment-109 No good reason, just been super lazy :( No good reason, just been super lazy :(

]]> Comment on Dispersion, Spectral Filtering, Subpixel Sampling by bbot http://www.kevinbeason.com/worklog/2009/06/06/dispersion-and-spectral-filtering/comment-page-1/#comment-69 bbot Fri, 15 Jan 2010 06:20:50 +0000 http://www.kevinbeason.com/worklog/?p=156#comment-69 Any reason you haven't posted anything for six months? Any reason you haven’t posted anything for six months?

]]> Comment on About by tuwqcmrg http://www.kevinbeason.com/worklog/about/comment-page-1/#comment-60 tuwqcmrg Thu, 29 Oct 2009 21:01:37 +0000 http://www.kevinbeason.com/worklog/?page_id=2#comment-60 csvuMC <a href="http://jgkgqvslorlm.com/" rel="nofollow">jgkgqvslorlm</a>, [url=http://afdekobydndi.com/]afdekobydndi[/url], [link=http://bgmqpmjghedh.com/]bgmqpmjghedh[/link], http://flltkmisphbo.com/ csvuMC jgkgqvslorlm, [url=http://afdekobydndi.com/]afdekobydndi[/url], [link=http://bgmqpmjghedh.com/]bgmqpmjghedh[/link], http://flltkmisphbo.com/

]]> Comment on Preetham et el. sun and sky light model by Marcio http://www.kevinbeason.com/worklog/2008/10/26/preetham-et-el-sun-and-sky-light-model/comment-page-1/#comment-38 Marcio Tue, 16 Jun 2009 08:43:43 +0000 http://www.kevinbeason.com/worklog/?p=37#comment-38 Hi there, Great Stuff! I have been trying to implement the Preetham model myself. I have a question though: how did you compute the sun radiance (and converted appropriately to "color space")? Keep those nice renders coming :) Cheers Hi there,

Great Stuff! I have been trying to implement the Preetham model myself.

I have a question though: how did you compute the sun radiance (and converted appropriately to “color space”)?

Keep those nice renders coming :)

Cheers

]]> Comment on Multiple Importance Sampling by phresnel http://www.kevinbeason.com/worklog/2009/06/03/151/comment-page-1/#comment-36 phresnel Fri, 12 Jun 2009 07:18:21 +0000 http://www.kevinbeason.com/worklog/?p=151#comment-36 "phresnel: not at all, why do you say that?" That was addressed to my lazy butt, which fails to compose a blog-entry on a regular basis :D “phresnel: not at all, why do you say that?”

That was addressed to my lazy butt, which fails to compose a blog-entry on a regular basis :D

]]> Comment on Multiple Importance Sampling by beason http://www.kevinbeason.com/worklog/2009/06/03/151/comment-page-1/#comment-34 beason Tue, 09 Jun 2009 18:46:56 +0000 http://www.kevinbeason.com/worklog/?p=151#comment-34 Bugs in my implementation. I updated my post to clarify that. Thanks! While we are on the subject... I think there is a "bug" in the Schlick BRDF. Rather, the importance sampling formulas do not match any given PDF perfectly, since I see different results between BRDF importance sampling and light sampling for the anisotropic cases. I was only able to make the isotropic cases match by scaling by ratio (...). I'm not sure though, and I suppose a little integration could determine what the problem is. Bugs in my implementation. I updated my post to clarify that. Thanks!

While we are on the subject… I think there is a “bug” in the Schlick BRDF. Rather, the importance sampling formulas do not match any given PDF perfectly, since I see different results between BRDF importance sampling and light sampling for the anisotropic cases. I was only able to make the isotropic cases match by scaling by ratio (…). I’m not sure though, and I suppose a little integration could determine what the problem is.

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