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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 Cobbs595March 11, 2013 10:38PM
Re: T-Junctions re-visited Tim Gould274March 11, 2013 11:31PM
Re: T-Junctions re-visited Roland Melkert250March 12, 2013 11:17AM
Re: T-Junctions re-visited Ben Supnik259March 12, 2013 11:17AM
Re: T-Junctions re-visited Roland Melkert242March 12, 2013 11:22AM
Re: T-Junctions re-visited Ben Supnik242March 12, 2013 11:32AM
Re: T-Junctions re-visited Roland Melkert239March 12, 2013 11:41AM
Re: T-Junctions re-visited Ben Supnik249March 12, 2013 11:55AM
Re: T-Junctions re-visited Roland Melkert241March 13, 2013 10:08AM
Re: T-Junctions re-visited Travis Cobbs267March 13, 2013 11:27AM
Re: T-Junctions re-visited Allen Smith289March 12, 2013 02:01PM
Re: T-Junctions re-visited Michael Heidemann255March 13, 2013 09:27AM
Re: T-Junctions re-visited Ben Supnik254March 13, 2013 10:37AM
Re: T-Junctions re-visited Tim Gould237March 13, 2013 02:31PM
Re: T-Junctions re-visited Michael Heidemann236March 13, 2013 03:42PM
Re: T-Junctions re-visited Michael Heidemann229March 17, 2013 04:35AM
Re: T-Junctions re-visited Ben Supnik210March 17, 2013 08:43AM
Re: T-Junctions re-visited Michael Heidemann216March 17, 2013 08:59AM
Re: T-Junctions re-visited Ben Supnik219March 17, 2013 09:02AM
Re: T-Junctions re-visited Magnus Forsberg217March 17, 2013 09:15AM
Re: T-Junctions re-visited Travis Cobbs264March 17, 2013 10:09PM
Re: T-Junctions re-visited Ben Supnik241March 18, 2013 07:30AM
Re: T-Junctions re-visited Travis Cobbs251March 18, 2013 10:57AM
Re: T-Junctions re-visited Ben Supnik255March 18, 2013 11:27AM
Re: T-Junctions re-visited Travis Cobbs246March 18, 2013 12:23PM
Re: T-Junctions re-visited Ben Supnik256March 18, 2013 01:41PM
Re: T-Junctions re-visited Roland Melkert265March 18, 2013 02:51PM
Re: T-Junctions re-visited Travis Cobbs242March 18, 2013 02:59PM
Re: T-Junctions re-visited Roland Melkert263March 18, 2013 03:41PM
Re: T-Junctions re-visited Ben Supnik252March 18, 2013 06:09PM
Re: T-Junctions re-visited Roland Melkert254March 19, 2013 11:38AM
Re: T-Junctions re-visited Ben Supnik274March 19, 2013 11:43AM
Re: T-Junctions re-visited Roland Melkert291March 19, 2013 07:07PM
Re: T-Junctions re-visited Travis Cobbs261March 19, 2013 10:13PM
Re: T-Junctions re-visited Tim Gould250March 20, 2013 03:56AM
Re: T-Junctions re-visited Travis Cobbs235March 20, 2013 10:13AM
Re: T-Junctions re-visited Ben Supnik228March 20, 2013 10:23AM
Re: T-Junctions re-visited Travis Cobbs240March 20, 2013 10:29AM
Re: T-Junctions re-visited Travis Cobbs239March 20, 2013 10:26AM
Re: T-Junctions re-visited Ben Supnik219March 20, 2013 11:18AM
Re: T-Junctions re-visited Ben Supnik239March 20, 2013 06:42AM
Re: T-Junctions re-visited Roland Melkert236March 20, 2013 11:36AM
Re: T-Junctions re-visited Philippe Hurbain245March 20, 2013 06:36AM
Re: T-Junctions re-visited Ben Supnik242March 20, 2013 06:58AM
Re: T-Junctions re-visited Allen Smith250March 20, 2013 09:08AM
Re: T-Junctions re-visited Roland Melkert261March 20, 2013 11:35AM
Re: T-Junctions re-visited Ben Supnik633March 20, 2013 11:50AM
Re: T-Junctions re-visited Michael Heidemann261March 18, 2013 03:54PM
Re: T-Junctions re-visited Roland Melkert239March 13, 2013 10:03AM
Re: T-Junctions re-visited Tim Gould218March 13, 2013 03:56PM
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Re: T-Junctions re-visited Roland Melkert287March 13, 2013 04:36PM
Re: T-Junctions re-visited Tim Gould250March 13, 2013 05:10PM
Re: T-Junctions re-visited Ben Supnik228March 14, 2013 08:17PM
Re: T-Junctions re-visited Tim Gould290March 14, 2013 08:41PM
Re: T-Junctions re-visited Ben Supnik285March 15, 2013 10:56AM
Re: T-Junctions re-visited Roland Melkert239March 15, 2013 11:36AM
Re: T-Junctions re-visited Ben Supnik222March 13, 2013 06:58PM
Re: T-Junctions re-visited Roland Melkert227March 13, 2013 07:27PM
Re: T-Junctions re-visited Ben Supnik206March 13, 2013 07:37PM
Re: T-Junctions re-visited Roland Melkert225March 13, 2013 07:59PM
Re: T-Junctions re-visited Ben Supnik252March 13, 2013 08:18PM
Re: T-Junctions re-visited Travis Cobbs270March 14, 2013 03:23PM
Re: T-Junctions re-visited Roland Melkert277March 14, 2013 03:34PM
Re: T-Junctions re-visited Tim Gould296March 14, 2013 03:41PM
Re: T-Junctions re-visited Roland Melkert259March 15, 2013 11:33AM
Re: T-Junctions re-visited Tim Gould219March 13, 2013 07:43PM
Re: T-Junctions re-visited Roland Melkert225March 13, 2013 08:08PM
Re: T-Junctions re-visited Tim Gould231March 13, 2013 08:18PM
Re: T-Junctions re-visited Ben Supnik292March 14, 2013 08:15PM
Re: T-Junctions re-visited Roland Melkert280March 15, 2013 11:29AM
Re: T-Junctions re-visited Travis Cobbs252March 15, 2013 12:27PM
Re: T-Junctions re-visited Ben Supnik266March 15, 2013 05:08PM
Re: T-Junctions re-visited Travis Cobbs252March 16, 2013 11:29PM
Re: T-Junctions re-visited Ben Supnik207March 17, 2013 08:58AM
Re: T-Junctions re-visited Roland Melkert218March 17, 2013 12:35PM
Re: T-Junctions re-visited Travis Cobbs239March 18, 2013 12:28PM
Re: T-Junctions re-visited Travis Cobbs261March 18, 2013 12:32PM
Re: T-Junctions re-visited Roland Melkert255March 18, 2013 05:00PM
Re: T-Junctions re-visited Travis Cobbs286March 18, 2013 11:05PM
Re: T-Junctions re-visited Roland Melkert306March 19, 2013 11:38AM
Re: T-Junctions re-visited Sergio Reano288March 26, 2013 02:46PM
Re: T-Junctions re-visited Roland Melkert238March 27, 2013 11:19AM
Re: T-Junctions re-visited Sergio Reano290March 27, 2013 01:48PM



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