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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 Cobbs880March 11, 2013 10:38PM
Re: T-Junctions re-visited Tim Gould465March 11, 2013 11:31PM
Re: T-Junctions re-visited Roland Melkert411March 12, 2013 11:17AM
Re: T-Junctions re-visited Ben Supnik422March 12, 2013 11:17AM
Re: T-Junctions re-visited Roland Melkert395March 12, 2013 11:22AM
Re: T-Junctions re-visited Ben Supnik377March 12, 2013 11:32AM
Re: T-Junctions re-visited Roland Melkert371March 12, 2013 11:41AM
Re: T-Junctions re-visited Ben Supnik381March 12, 2013 11:55AM
Re: T-Junctions re-visited Roland Melkert378March 13, 2013 10:08AM
Re: T-Junctions re-visited Travis Cobbs403March 13, 2013 11:27AM
Re: T-Junctions re-visited Allen Smith411March 12, 2013 02:01PM
Re: T-Junctions re-visited Michael Heidemann397March 13, 2013 09:27AM
Re: T-Junctions re-visited Ben Supnik380March 13, 2013 10:37AM
Re: T-Junctions re-visited Tim Gould388March 13, 2013 02:31PM
Re: T-Junctions re-visited Michael Heidemann370March 13, 2013 03:42PM
Re: T-Junctions re-visited Michael Heidemann400March 17, 2013 04:35AM
Re: T-Junctions re-visited Ben Supnik341March 17, 2013 08:43AM
Re: T-Junctions re-visited Michael Heidemann337March 17, 2013 08:59AM
Re: T-Junctions re-visited Ben Supnik332March 17, 2013 09:02AM
Re: T-Junctions re-visited Magnus Forsberg354March 17, 2013 09:15AM
Re: T-Junctions re-visited Travis Cobbs417March 17, 2013 10:09PM
Re: T-Junctions re-visited Ben Supnik381March 18, 2013 07:30AM
Re: T-Junctions re-visited Travis Cobbs378March 18, 2013 10:57AM
Re: T-Junctions re-visited Ben Supnik389March 18, 2013 11:27AM
Re: T-Junctions re-visited Travis Cobbs365March 18, 2013 12:23PM
Re: T-Junctions re-visited Ben Supnik425March 18, 2013 01:41PM
Re: T-Junctions re-visited Roland Melkert441March 18, 2013 02:51PM
Re: T-Junctions re-visited Travis Cobbs409March 18, 2013 02:59PM
Re: T-Junctions re-visited Roland Melkert477March 18, 2013 03:41PM
Re: T-Junctions re-visited Ben Supnik464March 18, 2013 06:09PM
Re: T-Junctions re-visited Roland Melkert410March 19, 2013 11:38AM
Re: T-Junctions re-visited Ben Supnik427March 19, 2013 11:43AM
Re: T-Junctions re-visited Roland Melkert450March 19, 2013 07:07PM
Re: T-Junctions re-visited Travis Cobbs419March 19, 2013 10:13PM
Re: T-Junctions re-visited Tim Gould426March 20, 2013 03:56AM
Re: T-Junctions re-visited Travis Cobbs388March 20, 2013 10:13AM
Re: T-Junctions re-visited Ben Supnik387March 20, 2013 10:23AM
Re: T-Junctions re-visited Travis Cobbs419March 20, 2013 10:29AM
Re: T-Junctions re-visited Travis Cobbs391March 20, 2013 10:26AM
Re: T-Junctions re-visited Ben Supnik371March 20, 2013 11:18AM
Re: T-Junctions re-visited Ben Supnik395March 20, 2013 06:42AM
Re: T-Junctions re-visited Roland Melkert373March 20, 2013 11:36AM
Re: T-Junctions re-visited Philippe Hurbain400March 20, 2013 06:36AM
Re: T-Junctions re-visited Ben Supnik437March 20, 2013 06:58AM
Re: T-Junctions re-visited Allen Smith438March 20, 2013 09:08AM
Re: T-Junctions re-visited Roland Melkert490March 20, 2013 11:35AM
Re: T-Junctions re-visited Ben Supnik913March 20, 2013 11:50AM
Re: T-Junctions re-visited Michael Heidemann450March 18, 2013 03:54PM
Re: T-Junctions re-visited Roland Melkert380March 13, 2013 10:03AM
Re: T-Junctions re-visited Tim Gould345March 13, 2013 03:56PM
Re: T-Junctions re-visited Sergio Reano338March 13, 2013 03:51PM
Re: T-Junctions re-visited Roland Melkert415March 13, 2013 04:36PM
Re: T-Junctions re-visited Tim Gould371March 13, 2013 05:10PM
Re: T-Junctions re-visited Ben Supnik413March 14, 2013 08:17PM
Re: T-Junctions re-visited Tim Gould469March 14, 2013 08:41PM
Re: T-Junctions re-visited Ben Supnik438March 15, 2013 10:56AM
Re: T-Junctions re-visited Roland Melkert383March 15, 2013 11:36AM
Re: T-Junctions re-visited Ben Supnik337March 13, 2013 06:58PM
Re: T-Junctions re-visited Roland Melkert348March 13, 2013 07:27PM
Re: T-Junctions re-visited Ben Supnik337March 13, 2013 07:37PM
Re: T-Junctions re-visited Roland Melkert386March 13, 2013 07:59PM
Re: T-Junctions re-visited Ben Supnik388March 13, 2013 08:18PM
Re: T-Junctions re-visited Travis Cobbs456March 14, 2013 03:23PM
Re: T-Junctions re-visited Roland Melkert467March 14, 2013 03:34PM
Re: T-Junctions re-visited Tim Gould455March 14, 2013 03:41PM
Re: T-Junctions re-visited Roland Melkert434March 15, 2013 11:33AM
Re: T-Junctions re-visited Tim Gould375March 13, 2013 07:43PM
Re: T-Junctions re-visited Roland Melkert366March 13, 2013 08:08PM
Re: T-Junctions re-visited Tim Gould383March 13, 2013 08:18PM
Re: T-Junctions re-visited Ben Supnik460March 14, 2013 08:15PM
Re: T-Junctions re-visited Roland Melkert436March 15, 2013 11:29AM
Re: T-Junctions re-visited Travis Cobbs411March 15, 2013 12:27PM
Re: T-Junctions re-visited Ben Supnik399March 15, 2013 05:08PM
Re: T-Junctions re-visited Travis Cobbs420March 16, 2013 11:29PM
Re: T-Junctions re-visited Ben Supnik338March 17, 2013 08:58AM
Re: T-Junctions re-visited Roland Melkert329March 17, 2013 12:35PM
Re: T-Junctions re-visited Travis Cobbs369March 18, 2013 12:28PM
Re: T-Junctions re-visited Travis Cobbs455March 18, 2013 12:32PM
Re: T-Junctions re-visited Roland Melkert413March 18, 2013 05:00PM
Re: T-Junctions re-visited Travis Cobbs441March 18, 2013 11:05PM
Re: T-Junctions re-visited Roland Melkert499March 19, 2013 11:38AM
Re: T-Junctions re-visited Sergio Reano444March 26, 2013 02:46PM
Re: T-Junctions re-visited Roland Melkert370March 27, 2013 11:19AM
Re: T-Junctions re-visited Sergio Reano469March 27, 2013 01:48PM



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