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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 Cobbs802March 11, 2013 10:38PM
Re: T-Junctions re-visited Tim Gould406March 11, 2013 11:31PM
Re: T-Junctions re-visited Roland Melkert375March 12, 2013 11:17AM
Re: T-Junctions re-visited Ben Supnik394March 12, 2013 11:17AM
Re: T-Junctions re-visited Roland Melkert364March 12, 2013 11:22AM
Re: T-Junctions re-visited Ben Supnik351March 12, 2013 11:32AM
Re: T-Junctions re-visited Roland Melkert341March 12, 2013 11:41AM
Re: T-Junctions re-visited Ben Supnik351March 12, 2013 11:55AM
Re: T-Junctions re-visited Roland Melkert349March 13, 2013 10:08AM
Re: T-Junctions re-visited Travis Cobbs372March 13, 2013 11:27AM
Re: T-Junctions re-visited Allen Smith381March 12, 2013 02:01PM
Re: T-Junctions re-visited Michael Heidemann367March 13, 2013 09:27AM
Re: T-Junctions re-visited Ben Supnik354March 13, 2013 10:37AM
Re: T-Junctions re-visited Tim Gould353March 13, 2013 02:31PM
Re: T-Junctions re-visited Michael Heidemann340March 13, 2013 03:42PM
Re: T-Junctions re-visited Michael Heidemann375March 17, 2013 04:35AM
Re: T-Junctions re-visited Ben Supnik309March 17, 2013 08:43AM
Re: T-Junctions re-visited Michael Heidemann311March 17, 2013 08:59AM
Re: T-Junctions re-visited Ben Supnik305March 17, 2013 09:02AM
Re: T-Junctions re-visited Magnus Forsberg328March 17, 2013 09:15AM
Re: T-Junctions re-visited Travis Cobbs384March 17, 2013 10:09PM
Re: T-Junctions re-visited Ben Supnik348March 18, 2013 07:30AM
Re: T-Junctions re-visited Travis Cobbs339March 18, 2013 10:57AM
Re: T-Junctions re-visited Ben Supnik352March 18, 2013 11:27AM
Re: T-Junctions re-visited Travis Cobbs342March 18, 2013 12:23PM
Re: T-Junctions re-visited Ben Supnik377March 18, 2013 01:41PM
Re: T-Junctions re-visited Roland Melkert396March 18, 2013 02:51PM
Re: T-Junctions re-visited Travis Cobbs366March 18, 2013 02:59PM
Re: T-Junctions re-visited Roland Melkert434March 18, 2013 03:41PM
Re: T-Junctions re-visited Ben Supnik408March 18, 2013 06:09PM
Re: T-Junctions re-visited Roland Melkert360March 19, 2013 11:38AM
Re: T-Junctions re-visited Ben Supnik383March 19, 2013 11:43AM
Re: T-Junctions re-visited Roland Melkert403March 19, 2013 07:07PM
Re: T-Junctions re-visited Travis Cobbs375March 19, 2013 10:13PM
Re: T-Junctions re-visited Tim Gould379March 20, 2013 03:56AM
Re: T-Junctions re-visited Travis Cobbs347March 20, 2013 10:13AM
Re: T-Junctions re-visited Ben Supnik340March 20, 2013 10:23AM
Re: T-Junctions re-visited Travis Cobbs370March 20, 2013 10:29AM
Re: T-Junctions re-visited Travis Cobbs348March 20, 2013 10:26AM
Re: T-Junctions re-visited Ben Supnik330March 20, 2013 11:18AM
Re: T-Junctions re-visited Ben Supnik365March 20, 2013 06:42AM
Re: T-Junctions re-visited Roland Melkert326March 20, 2013 11:36AM
Re: T-Junctions re-visited Philippe Hurbain363March 20, 2013 06:36AM
Re: T-Junctions re-visited Ben Supnik408March 20, 2013 06:58AM
Re: T-Junctions re-visited Allen Smith389March 20, 2013 09:08AM
Re: T-Junctions re-visited Roland Melkert430March 20, 2013 11:35AM
Re: T-Junctions re-visited Ben Supnik854March 20, 2013 11:50AM
Re: T-Junctions re-visited Michael Heidemann403March 18, 2013 03:54PM
Re: T-Junctions re-visited Roland Melkert354March 13, 2013 10:03AM
Re: T-Junctions re-visited Tim Gould320March 13, 2013 03:56PM
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Re: T-Junctions re-visited Roland Melkert390March 13, 2013 04:36PM
Re: T-Junctions re-visited Tim Gould339March 13, 2013 05:10PM
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Re: T-Junctions re-visited Tim Gould418March 14, 2013 08:41PM
Re: T-Junctions re-visited Ben Supnik408March 15, 2013 10:56AM
Re: T-Junctions re-visited Roland Melkert358March 15, 2013 11:36AM
Re: T-Junctions re-visited Ben Supnik309March 13, 2013 06:58PM
Re: T-Junctions re-visited Roland Melkert319March 13, 2013 07:27PM
Re: T-Junctions re-visited Ben Supnik314March 13, 2013 07:37PM
Re: T-Junctions re-visited Roland Melkert340March 13, 2013 07:59PM
Re: T-Junctions re-visited Ben Supnik342March 13, 2013 08:18PM
Re: T-Junctions re-visited Travis Cobbs407March 14, 2013 03:23PM
Re: T-Junctions re-visited Roland Melkert420March 14, 2013 03:34PM
Re: T-Junctions re-visited Tim Gould404March 14, 2013 03:41PM
Re: T-Junctions re-visited Roland Melkert405March 15, 2013 11:33AM
Re: T-Junctions re-visited Tim Gould352March 13, 2013 07:43PM
Re: T-Junctions re-visited Roland Melkert320March 13, 2013 08:08PM
Re: T-Junctions re-visited Tim Gould342March 13, 2013 08:18PM
Re: T-Junctions re-visited Ben Supnik408March 14, 2013 08:15PM
Re: T-Junctions re-visited Roland Melkert400March 15, 2013 11:29AM
Re: T-Junctions re-visited Travis Cobbs380March 15, 2013 12:27PM
Re: T-Junctions re-visited Ben Supnik366March 15, 2013 05:08PM
Re: T-Junctions re-visited Travis Cobbs390March 16, 2013 11:29PM
Re: T-Junctions re-visited Ben Supnik295March 17, 2013 08:58AM
Re: T-Junctions re-visited Roland Melkert296March 17, 2013 12:35PM
Re: T-Junctions re-visited Travis Cobbs340March 18, 2013 12:28PM
Re: T-Junctions re-visited Travis Cobbs416March 18, 2013 12:32PM
Re: T-Junctions re-visited Roland Melkert368March 18, 2013 05:00PM
Re: T-Junctions re-visited Travis Cobbs397March 18, 2013 11:05PM
Re: T-Junctions re-visited Roland Melkert450March 19, 2013 11:38AM
Re: T-Junctions re-visited Sergio Reano393March 26, 2013 02:46PM
Re: T-Junctions re-visited Roland Melkert334March 27, 2013 11:19AM
Re: T-Junctions re-visited Sergio Reano429March 27, 2013 01:48PM



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