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Re: T-Junctions re-visited
March 20, 2013 11:50AM
Yeah - I grabbed a cube map of some sky + clouds off the web; since the lighting is already in shader, doing a cube map lookup is sort a cheap gag. :-) The math for the reflection calcs (they're slightly different from regular normal mapping can be found here:

http://http.developer.nvidia.com/GPUGems/gpugems_ch19.html

In the long term I'm thinking: diffuse and specular lighting can be built entirely off of cube maps, by doing a pre-processing stage on an environment map. If you look at this:



The right two images can be used to replace lighting equations, and they are entirely derived from the left image. The advantages of this technique are:

- The lighting looks 'the same' between metal parts and non-metal parts, because the diffuse/specular lighting came from the reflection of the room.

- The lighting model is complex, soft, and diffuse. I think most of our experience viewing lego bricks is indoors, so a fair amount of the light has bounced off of the ceiling, white walls, come from a window (an 'area light for our purposes, etc.). So a cube map may get us to an accurate 'room' environment faster than creating a gajillion point GL lights.

Cheers
Ben
SubjectAuthorViewsPosted
T-Junctions re-visited Travis Cobbs586March 11, 2013 10:38PM
Re: T-Junctions re-visited Tim Gould262March 11, 2013 11:31PM
Re: T-Junctions re-visited Roland Melkert246March 12, 2013 11:17AM
Re: T-Junctions re-visited Ben Supnik250March 12, 2013 11:17AM
Re: T-Junctions re-visited Roland Melkert238March 12, 2013 11:22AM
Re: T-Junctions re-visited Ben Supnik238March 12, 2013 11:32AM
Re: T-Junctions re-visited Roland Melkert229March 12, 2013 11:41AM
Re: T-Junctions re-visited Ben Supnik240March 12, 2013 11:55AM
Re: T-Junctions re-visited Roland Melkert233March 13, 2013 10:08AM
Re: T-Junctions re-visited Travis Cobbs255March 13, 2013 11:27AM
Re: T-Junctions re-visited Allen Smith282March 12, 2013 02:01PM
Re: T-Junctions re-visited Michael Heidemann240March 13, 2013 09:27AM
Re: T-Junctions re-visited Ben Supnik240March 13, 2013 10:37AM
Re: T-Junctions re-visited Tim Gould232March 13, 2013 02:31PM
Re: T-Junctions re-visited Michael Heidemann230March 13, 2013 03:42PM
Re: T-Junctions re-visited Michael Heidemann218March 17, 2013 04:35AM
Re: T-Junctions re-visited Ben Supnik207March 17, 2013 08:43AM
Re: T-Junctions re-visited Michael Heidemann205March 17, 2013 08:59AM
Re: T-Junctions re-visited Ben Supnik217March 17, 2013 09:02AM
Re: T-Junctions re-visited Magnus Forsberg210March 17, 2013 09:15AM
Re: T-Junctions re-visited Travis Cobbs244March 17, 2013 10:09PM
Re: T-Junctions re-visited Ben Supnik233March 18, 2013 07:30AM
Re: T-Junctions re-visited Travis Cobbs246March 18, 2013 10:57AM
Re: T-Junctions re-visited Ben Supnik249March 18, 2013 11:27AM
Re: T-Junctions re-visited Travis Cobbs238March 18, 2013 12:23PM
Re: T-Junctions re-visited Ben Supnik254March 18, 2013 01:41PM
Re: T-Junctions re-visited Roland Melkert259March 18, 2013 02:51PM
Re: T-Junctions re-visited Travis Cobbs231March 18, 2013 02:59PM
Re: T-Junctions re-visited Roland Melkert245March 18, 2013 03:41PM
Re: T-Junctions re-visited Ben Supnik249March 18, 2013 06:09PM
Re: T-Junctions re-visited Roland Melkert246March 19, 2013 11:38AM
Re: T-Junctions re-visited Ben Supnik263March 19, 2013 11:43AM
Re: T-Junctions re-visited Roland Melkert285March 19, 2013 07:07PM
Re: T-Junctions re-visited Travis Cobbs254March 19, 2013 10:13PM
Re: T-Junctions re-visited Tim Gould243March 20, 2013 03:56AM
Re: T-Junctions re-visited Travis Cobbs227March 20, 2013 10:13AM
Re: T-Junctions re-visited Ben Supnik219March 20, 2013 10:23AM
Re: T-Junctions re-visited Travis Cobbs232March 20, 2013 10:29AM
Re: T-Junctions re-visited Travis Cobbs228March 20, 2013 10:26AM
Re: T-Junctions re-visited Ben Supnik213March 20, 2013 11:18AM
Re: T-Junctions re-visited Ben Supnik230March 20, 2013 06:42AM
Re: T-Junctions re-visited Roland Melkert234March 20, 2013 11:36AM
Re: T-Junctions re-visited Philippe Hurbain235March 20, 2013 06:36AM
Re: T-Junctions re-visited Ben Supnik237March 20, 2013 06:58AM
Re: T-Junctions re-visited Allen Smith241March 20, 2013 09:08AM
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Re: T-Junctions re-visited Ben Supnik621March 20, 2013 11:50AM
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Re: T-Junctions re-visited Tim Gould240March 13, 2013 05:10PM
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Re: T-Junctions re-visited Roland Melkert220March 13, 2013 07:59PM
Re: T-Junctions re-visited Ben Supnik244March 13, 2013 08:18PM
Re: T-Junctions re-visited Travis Cobbs266March 14, 2013 03:23PM
Re: T-Junctions re-visited Roland Melkert273March 14, 2013 03:34PM
Re: T-Junctions re-visited Tim Gould288March 14, 2013 03:41PM
Re: T-Junctions re-visited Roland Melkert248March 15, 2013 11:33AM
Re: T-Junctions re-visited Tim Gould205March 13, 2013 07:43PM
Re: T-Junctions re-visited Roland Melkert219March 13, 2013 08:08PM
Re: T-Junctions re-visited Tim Gould217March 13, 2013 08:18PM
Re: T-Junctions re-visited Ben Supnik281March 14, 2013 08:15PM
Re: T-Junctions re-visited Roland Melkert265March 15, 2013 11:29AM
Re: T-Junctions re-visited Travis Cobbs241March 15, 2013 12:27PM
Re: T-Junctions re-visited Ben Supnik256March 15, 2013 05:08PM
Re: T-Junctions re-visited Travis Cobbs243March 16, 2013 11:29PM
Re: T-Junctions re-visited Ben Supnik204March 17, 2013 08:58AM
Re: T-Junctions re-visited Roland Melkert210March 17, 2013 12:35PM
Re: T-Junctions re-visited Travis Cobbs232March 18, 2013 12:28PM
Re: T-Junctions re-visited Travis Cobbs249March 18, 2013 12:32PM
Re: T-Junctions re-visited Roland Melkert249March 18, 2013 05:00PM
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Re: T-Junctions re-visited Roland Melkert291March 19, 2013 11:38AM
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Re: T-Junctions re-visited Sergio Reano284March 27, 2013 01:48PM



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