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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 Cobbs635March 11, 2013 10:38PM
Re: T-Junctions re-visited Tim Gould293March 11, 2013 11:31PM
Re: T-Junctions re-visited Roland Melkert272March 12, 2013 11:17AM
Re: T-Junctions re-visited Ben Supnik282March 12, 2013 11:17AM
Re: T-Junctions re-visited Roland Melkert256March 12, 2013 11:22AM
Re: T-Junctions re-visited Ben Supnik263March 12, 2013 11:32AM
Re: T-Junctions re-visited Roland Melkert256March 12, 2013 11:41AM
Re: T-Junctions re-visited Ben Supnik264March 12, 2013 11:55AM
Re: T-Junctions re-visited Roland Melkert259March 13, 2013 10:08AM
Re: T-Junctions re-visited Travis Cobbs284March 13, 2013 11:27AM
Re: T-Junctions re-visited Allen Smith303March 12, 2013 02:01PM
Re: T-Junctions re-visited Michael Heidemann269March 13, 2013 09:27AM
Re: T-Junctions re-visited Ben Supnik264March 13, 2013 10:37AM
Re: T-Junctions re-visited Tim Gould252March 13, 2013 02:31PM
Re: T-Junctions re-visited Michael Heidemann256March 13, 2013 03:42PM
Re: T-Junctions re-visited Michael Heidemann246March 17, 2013 04:35AM
Re: T-Junctions re-visited Ben Supnik235March 17, 2013 08:43AM
Re: T-Junctions re-visited Michael Heidemann231March 17, 2013 08:59AM
Re: T-Junctions re-visited Ben Supnik241March 17, 2013 09:02AM
Re: T-Junctions re-visited Magnus Forsberg234March 17, 2013 09:15AM
Re: T-Junctions re-visited Travis Cobbs305March 17, 2013 10:09PM
Re: T-Junctions re-visited Ben Supnik261March 18, 2013 07:30AM
Re: T-Junctions re-visited Travis Cobbs268March 18, 2013 10:57AM
Re: T-Junctions re-visited Ben Supnik277March 18, 2013 11:27AM
Re: T-Junctions re-visited Travis Cobbs260March 18, 2013 12:23PM
Re: T-Junctions re-visited Ben Supnik279March 18, 2013 01:41PM
Re: T-Junctions re-visited Roland Melkert285March 18, 2013 02:51PM
Re: T-Junctions re-visited Travis Cobbs259March 18, 2013 02:59PM
Re: T-Junctions re-visited Roland Melkert285March 18, 2013 03:41PM
Re: T-Junctions re-visited Ben Supnik271March 18, 2013 06:09PM
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Re: T-Junctions re-visited Ben Supnik300March 19, 2013 11:43AM
Re: T-Junctions re-visited Roland Melkert312March 19, 2013 07:07PM
Re: T-Junctions re-visited Travis Cobbs283March 19, 2013 10:13PM
Re: T-Junctions re-visited Tim Gould271March 20, 2013 03:56AM
Re: T-Junctions re-visited Travis Cobbs261March 20, 2013 10:13AM
Re: T-Junctions re-visited Ben Supnik250March 20, 2013 10:23AM
Re: T-Junctions re-visited Travis Cobbs263March 20, 2013 10:29AM
Re: T-Junctions re-visited Travis Cobbs265March 20, 2013 10:26AM
Re: T-Junctions re-visited Ben Supnik240March 20, 2013 11:18AM
Re: T-Junctions re-visited Ben Supnik259March 20, 2013 06:42AM
Re: T-Junctions re-visited Roland Melkert252March 20, 2013 11:36AM
Re: T-Junctions re-visited Philippe Hurbain260March 20, 2013 06:36AM
Re: T-Junctions re-visited Ben Supnik264March 20, 2013 06:58AM
Re: T-Junctions re-visited Allen Smith270March 20, 2013 09:08AM
Re: T-Junctions re-visited Roland Melkert283March 20, 2013 11:35AM
Re: T-Junctions re-visited Ben Supnik666March 20, 2013 11:50AM
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Re: T-Junctions re-visited Roland Melkert259March 13, 2013 10:03AM
Re: T-Junctions re-visited Tim Gould236March 13, 2013 03:56PM
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Re: T-Junctions re-visited Roland Melkert307March 13, 2013 04:36PM
Re: T-Junctions re-visited Tim Gould265March 13, 2013 05:10PM
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Re: T-Junctions re-visited Tim Gould316March 14, 2013 08:41PM
Re: T-Junctions re-visited Ben Supnik307March 15, 2013 10:56AM
Re: T-Junctions re-visited Roland Melkert263March 15, 2013 11:36AM
Re: T-Junctions re-visited Ben Supnik234March 13, 2013 06:58PM
Re: T-Junctions re-visited Roland Melkert247March 13, 2013 07:27PM
Re: T-Junctions re-visited Ben Supnik232March 13, 2013 07:37PM
Re: T-Junctions re-visited Roland Melkert247March 13, 2013 07:59PM
Re: T-Junctions re-visited Ben Supnik272March 13, 2013 08:18PM
Re: T-Junctions re-visited Travis Cobbs292March 14, 2013 03:23PM
Re: T-Junctions re-visited Roland Melkert299March 14, 2013 03:34PM
Re: T-Junctions re-visited Tim Gould315March 14, 2013 03:41PM
Re: T-Junctions re-visited Roland Melkert280March 15, 2013 11:33AM
Re: T-Junctions re-visited Tim Gould240March 13, 2013 07:43PM
Re: T-Junctions re-visited Roland Melkert241March 13, 2013 08:08PM
Re: T-Junctions re-visited Tim Gould246March 13, 2013 08:18PM
Re: T-Junctions re-visited Ben Supnik306March 14, 2013 08:15PM
Re: T-Junctions re-visited Roland Melkert301March 15, 2013 11:29AM
Re: T-Junctions re-visited Travis Cobbs269March 15, 2013 12:27PM
Re: T-Junctions re-visited Ben Supnik283March 15, 2013 05:08PM
Re: T-Junctions re-visited Travis Cobbs269March 16, 2013 11:29PM
Re: T-Junctions re-visited Ben Supnik228March 17, 2013 08:58AM
Re: T-Junctions re-visited Roland Melkert233March 17, 2013 12:35PM
Re: T-Junctions re-visited Travis Cobbs257March 18, 2013 12:28PM
Re: T-Junctions re-visited Travis Cobbs277March 18, 2013 12:32PM
Re: T-Junctions re-visited Roland Melkert271March 18, 2013 05:00PM
Re: T-Junctions re-visited Travis Cobbs303March 18, 2013 11:05PM
Re: T-Junctions re-visited Roland Melkert325March 19, 2013 11:38AM
Re: T-Junctions re-visited Sergio Reano307March 26, 2013 02:46PM
Re: T-Junctions re-visited Roland Melkert258March 27, 2013 11:19AM
Re: T-Junctions re-visited Sergio Reano307March 27, 2013 01:48PM



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