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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 Cobbs926March 11, 2013 10:38PM
Re: T-Junctions re-visited Tim Gould487March 11, 2013 11:31PM
Re: T-Junctions re-visited Roland Melkert426March 12, 2013 11:17AM
Re: T-Junctions re-visited Ben Supnik440March 12, 2013 11:17AM
Re: T-Junctions re-visited Roland Melkert413March 12, 2013 11:22AM
Re: T-Junctions re-visited Ben Supnik398March 12, 2013 11:32AM
Re: T-Junctions re-visited Roland Melkert387March 12, 2013 11:41AM
Re: T-Junctions re-visited Ben Supnik400March 12, 2013 11:55AM
Re: T-Junctions re-visited Roland Melkert393March 13, 2013 10:08AM
Re: T-Junctions re-visited Travis Cobbs419March 13, 2013 11:27AM
Re: T-Junctions re-visited Allen Smith428March 12, 2013 02:01PM
Re: T-Junctions re-visited Michael Heidemann413March 13, 2013 09:27AM
Re: T-Junctions re-visited Ben Supnik390March 13, 2013 10:37AM
Re: T-Junctions re-visited Tim Gould399March 13, 2013 02:31PM
Re: T-Junctions re-visited Michael Heidemann382March 13, 2013 03:42PM
Re: T-Junctions re-visited Michael Heidemann413March 17, 2013 04:35AM
Re: T-Junctions re-visited Ben Supnik358March 17, 2013 08:43AM
Re: T-Junctions re-visited Michael Heidemann355March 17, 2013 08:59AM
Re: T-Junctions re-visited Ben Supnik343March 17, 2013 09:02AM
Re: T-Junctions re-visited Magnus Forsberg370March 17, 2013 09:15AM
Re: T-Junctions re-visited Travis Cobbs432March 17, 2013 10:09PM
Re: T-Junctions re-visited Ben Supnik400March 18, 2013 07:30AM
Re: T-Junctions re-visited Travis Cobbs394March 18, 2013 10:57AM
Re: T-Junctions re-visited Ben Supnik404March 18, 2013 11:27AM
Re: T-Junctions re-visited Travis Cobbs376March 18, 2013 12:23PM
Re: T-Junctions re-visited Ben Supnik450March 18, 2013 01:41PM
Re: T-Junctions re-visited Roland Melkert462March 18, 2013 02:51PM
Re: T-Junctions re-visited Travis Cobbs438March 18, 2013 02:59PM
Re: T-Junctions re-visited Roland Melkert503March 18, 2013 03:41PM
Re: T-Junctions re-visited Ben Supnik490March 18, 2013 06:09PM
Re: T-Junctions re-visited Roland Melkert433March 19, 2013 11:38AM
Re: T-Junctions re-visited Ben Supnik442March 19, 2013 11:43AM
Re: T-Junctions re-visited Roland Melkert467March 19, 2013 07:07PM
Re: T-Junctions re-visited Travis Cobbs444March 19, 2013 10:13PM
Re: T-Junctions re-visited Tim Gould450March 20, 2013 03:56AM
Re: T-Junctions re-visited Travis Cobbs410March 20, 2013 10:13AM
Re: T-Junctions re-visited Ben Supnik407March 20, 2013 10:23AM
Re: T-Junctions re-visited Travis Cobbs436March 20, 2013 10:29AM
Re: T-Junctions re-visited Travis Cobbs413March 20, 2013 10:26AM
Re: T-Junctions re-visited Ben Supnik391March 20, 2013 11:18AM
Re: T-Junctions re-visited Ben Supnik412March 20, 2013 06:42AM
Re: T-Junctions re-visited Roland Melkert389March 20, 2013 11:36AM
Re: T-Junctions re-visited Philippe Hurbain414March 20, 2013 06:36AM
Re: T-Junctions re-visited Ben Supnik452March 20, 2013 06:58AM
Re: T-Junctions re-visited Allen Smith464March 20, 2013 09:08AM
Re: T-Junctions re-visited Roland Melkert525March 20, 2013 11:35AM
Re: T-Junctions re-visited Ben Supnik934March 20, 2013 11:50AM
Re: T-Junctions re-visited Michael Heidemann477March 18, 2013 03:54PM
Re: T-Junctions re-visited Roland Melkert396March 13, 2013 10:03AM
Re: T-Junctions re-visited Tim Gould363March 13, 2013 03:56PM
Re: T-Junctions re-visited Sergio Reano351March 13, 2013 03:51PM
Re: T-Junctions re-visited Roland Melkert440March 13, 2013 04:36PM
Re: T-Junctions re-visited Tim Gould384March 13, 2013 05:10PM
Re: T-Junctions re-visited Ben Supnik433March 14, 2013 08:17PM
Re: T-Junctions re-visited Tim Gould486March 14, 2013 08:41PM
Re: T-Junctions re-visited Ben Supnik451March 15, 2013 10:56AM
Re: T-Junctions re-visited Roland Melkert396March 15, 2013 11:36AM
Re: T-Junctions re-visited Ben Supnik350March 13, 2013 06:58PM
Re: T-Junctions re-visited Roland Melkert368March 13, 2013 07:27PM
Re: T-Junctions re-visited Ben Supnik350March 13, 2013 07:37PM
Re: T-Junctions re-visited Roland Melkert407March 13, 2013 07:59PM
Re: T-Junctions re-visited Ben Supnik410March 13, 2013 08:18PM
Re: T-Junctions re-visited Travis Cobbs477March 14, 2013 03:23PM
Re: T-Junctions re-visited Roland Melkert492March 14, 2013 03:34PM
Re: T-Junctions re-visited Tim Gould474March 14, 2013 03:41PM
Re: T-Junctions re-visited Roland Melkert449March 15, 2013 11:33AM
Re: T-Junctions re-visited Tim Gould385March 13, 2013 07:43PM
Re: T-Junctions re-visited Roland Melkert384March 13, 2013 08:08PM
Re: T-Junctions re-visited Tim Gould405March 13, 2013 08:18PM
Re: T-Junctions re-visited Ben Supnik479March 14, 2013 08:15PM
Re: T-Junctions re-visited Roland Melkert447March 15, 2013 11:29AM
Re: T-Junctions re-visited Travis Cobbs427March 15, 2013 12:27PM
Re: T-Junctions re-visited Ben Supnik414March 15, 2013 05:08PM
Re: T-Junctions re-visited Travis Cobbs438March 16, 2013 11:29PM
Re: T-Junctions re-visited Ben Supnik351March 17, 2013 08:58AM
Re: T-Junctions re-visited Roland Melkert342March 17, 2013 12:35PM
Re: T-Junctions re-visited Travis Cobbs380March 18, 2013 12:28PM
Re: T-Junctions re-visited Travis Cobbs481March 18, 2013 12:32PM
Re: T-Junctions re-visited Roland Melkert435March 18, 2013 05:00PM
Re: T-Junctions re-visited Travis Cobbs460March 18, 2013 11:05PM
Re: T-Junctions re-visited Roland Melkert523March 19, 2013 11:38AM
Re: T-Junctions re-visited Sergio Reano465March 26, 2013 02:46PM
Re: T-Junctions re-visited Roland Melkert384March 27, 2013 11:19AM
Re: T-Junctions re-visited Sergio Reano494March 27, 2013 01:48PM



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