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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 Cobbs1111March 11, 2013 10:38PM
Re: T-Junctions re-visited Tim Gould589March 11, 2013 11:31PM
Re: T-Junctions re-visited Roland Melkert488March 12, 2013 11:17AM
Re: T-Junctions re-visited Ben Supnik525March 12, 2013 11:17AM
Re: T-Junctions re-visited Roland Melkert498March 12, 2013 11:22AM
Re: T-Junctions re-visited Ben Supnik481March 12, 2013 11:32AM
Re: T-Junctions re-visited Roland Melkert476March 12, 2013 11:41AM
Re: T-Junctions re-visited Ben Supnik476March 12, 2013 11:55AM
Re: T-Junctions re-visited Roland Melkert485March 13, 2013 10:08AM
Re: T-Junctions re-visited Travis Cobbs506March 13, 2013 11:27AM
Re: T-Junctions re-visited Allen Smith504March 12, 2013 02:01PM
Re: T-Junctions re-visited Michael Heidemann499March 13, 2013 09:27AM
Re: T-Junctions re-visited Ben Supnik476March 13, 2013 10:37AM
Re: T-Junctions re-visited Tim Gould486March 13, 2013 02:31PM
Re: T-Junctions re-visited Michael Heidemann466March 13, 2013 03:42PM
Re: T-Junctions re-visited Michael Heidemann493March 17, 2013 04:35AM
Re: T-Junctions re-visited Ben Supnik432March 17, 2013 08:43AM
Re: T-Junctions re-visited Michael Heidemann440March 17, 2013 08:59AM
Re: T-Junctions re-visited Ben Supnik414March 17, 2013 09:02AM
Re: T-Junctions re-visited Magnus Forsberg448March 17, 2013 09:15AM
Re: T-Junctions re-visited Travis Cobbs509March 17, 2013 10:09PM
Re: T-Junctions re-visited Ben Supnik492March 18, 2013 07:30AM
Re: T-Junctions re-visited Travis Cobbs495March 18, 2013 10:57AM
Re: T-Junctions re-visited Ben Supnik491March 18, 2013 11:27AM
Re: T-Junctions re-visited Travis Cobbs471March 18, 2013 12:23PM
Re: T-Junctions re-visited Ben Supnik563March 18, 2013 01:41PM
Re: T-Junctions re-visited Roland Melkert562March 18, 2013 02:51PM
Re: T-Junctions re-visited Travis Cobbs551March 18, 2013 02:59PM
Re: T-Junctions re-visited Roland Melkert601March 18, 2013 03:41PM
Re: T-Junctions re-visited Ben Supnik603March 18, 2013 06:09PM
Re: T-Junctions re-visited Roland Melkert540March 19, 2013 11:38AM
Re: T-Junctions re-visited Ben Supnik535March 19, 2013 11:43AM
Re: T-Junctions re-visited Roland Melkert568March 19, 2013 07:07PM
Re: T-Junctions re-visited Travis Cobbs562March 19, 2013 10:13PM
Re: T-Junctions re-visited Tim Gould557March 20, 2013 03:56AM
Re: T-Junctions re-visited Travis Cobbs518March 20, 2013 10:13AM
Re: T-Junctions re-visited Ben Supnik526March 20, 2013 10:23AM
Re: T-Junctions re-visited Travis Cobbs564March 20, 2013 10:29AM
Re: T-Junctions re-visited Travis Cobbs510March 20, 2013 10:26AM
Re: T-Junctions re-visited Ben Supnik487March 20, 2013 11:18AM
Re: T-Junctions re-visited Ben Supnik497March 20, 2013 06:42AM
Re: T-Junctions re-visited Roland Melkert484March 20, 2013 11:36AM
Re: T-Junctions re-visited Philippe Hurbain507March 20, 2013 06:36AM
Re: T-Junctions re-visited Ben Supnik519March 20, 2013 06:58AM
Re: T-Junctions re-visited Allen Smith577March 20, 2013 09:08AM
Re: T-Junctions re-visited Roland Melkert652March 20, 2013 11:35AM
Re: T-Junctions re-visited Ben Supnik1060March 20, 2013 11:50AM
Re: T-Junctions re-visited Michael Heidemann562March 18, 2013 03:54PM
Re: T-Junctions re-visited Roland Melkert482March 13, 2013 10:03AM
Re: T-Junctions re-visited Tim Gould439March 13, 2013 03:56PM
Re: T-Junctions re-visited Sergio Reano436March 13, 2013 03:51PM
Re: T-Junctions re-visited Roland Melkert515March 13, 2013 04:36PM
Re: T-Junctions re-visited Tim Gould456March 13, 2013 05:10PM
Re: T-Junctions re-visited Ben Supnik554March 14, 2013 08:17PM
Re: T-Junctions re-visited Tim Gould582March 14, 2013 08:41PM
Re: T-Junctions re-visited Ben Supnik525March 15, 2013 10:56AM
Re: T-Junctions re-visited Roland Melkert495March 15, 2013 11:36AM
Re: T-Junctions re-visited Ben Supnik417March 13, 2013 06:58PM
Re: T-Junctions re-visited Roland Melkert436March 13, 2013 07:27PM
Re: T-Junctions re-visited Ben Supnik422March 13, 2013 07:37PM
Re: T-Junctions re-visited Roland Melkert493March 13, 2013 07:59PM
Re: T-Junctions re-visited Ben Supnik495March 13, 2013 08:18PM
Re: T-Junctions re-visited Travis Cobbs588March 14, 2013 03:23PM
Re: T-Junctions re-visited Roland Melkert596March 14, 2013 03:34PM
Re: T-Junctions re-visited Tim Gould571March 14, 2013 03:41PM
Re: T-Junctions re-visited Roland Melkert541March 15, 2013 11:33AM
Re: T-Junctions re-visited Tim Gould470March 13, 2013 07:43PM
Re: T-Junctions re-visited Roland Melkert484March 13, 2013 08:08PM
Re: T-Junctions re-visited Tim Gould506March 13, 2013 08:18PM
Re: T-Junctions re-visited Ben Supnik589March 14, 2013 08:15PM
Re: T-Junctions re-visited Roland Melkert560March 15, 2013 11:29AM
Re: T-Junctions re-visited Travis Cobbs506March 15, 2013 12:27PM
Re: T-Junctions re-visited Ben Supnik497March 15, 2013 05:08PM
Re: T-Junctions re-visited Travis Cobbs522March 16, 2013 11:29PM
Re: T-Junctions re-visited Ben Supnik446March 17, 2013 08:58AM
Re: T-Junctions re-visited Roland Melkert425March 17, 2013 12:35PM
Re: T-Junctions re-visited Travis Cobbs460March 18, 2013 12:28PM
Re: T-Junctions re-visited Travis Cobbs584March 18, 2013 12:32PM
Re: T-Junctions re-visited Roland Melkert530March 18, 2013 05:00PM
Re: T-Junctions re-visited Travis Cobbs574March 18, 2013 11:05PM
Re: T-Junctions re-visited Roland Melkert632March 19, 2013 11:38AM
Re: T-Junctions re-visited Sergio Reano556March 26, 2013 02:46PM
Re: T-Junctions re-visited Roland Melkert468March 27, 2013 11:19AM
Re: T-Junctions re-visited Sergio Reano569March 27, 2013 01:48PM



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