[Radiance-general] Re: Physically-based rendering using OpenGL?

[R Fritz]

Thank you. That makes it clear that something is possible. But what? As 
of version 3.5, Mental Ray (the base of iray) had some serious 
limitations in physically based rendering. In Labayrade and 
Fontoynont's 2009 CIE 171:2006 testing, it could not, for instance, 
simulate a clear sky. Iray is based on Mental Ray 3.8, and it is 
possible that some of those problems have been resolved since version 
3.5, but there does not seem to have been any testing published that 
says so. Mental Image's iray site doesn't mention CIE 171. The 
Luxrender site doesn't mention any testing at all. Are you aware of any 
testing that shows accuracy of either of these tools in the physical 
simulation of light?

Greg, have you looked at this at all?

Randolph

Ref: Labayrade, Raphael, and Marc Fontoynont. “Use of CIE 171:2006 Test 
Cases to Assess the Scope of Lighting Simulation Programs.” CIE Light 
and Lighting 2009, n.d. (Seen in preprint.)




On 2010-07-11 23:46:21 -0700, Ignacio Munarriz said:

> There are several approaches to get global illumintation on gpus,
> es.wikipedia.org/wiki/OpenCL
> es.wikipedia.org/wiki/CUDA
> http://www.luxrender.net/wiki/index.php?title=Luxrender_and_OpenCL 
> (Open Source)
> http://www.mentalimages.com/products/iray.html (commercial)
> http://www.youtube.com/watch?v=eRoSFNRQETg (commercial)
> 
> 
> El 12/07/2010 4:21, R Fritz escribió:
> Has anyone tried this, or know anything about it? With the 32-bit (and 
> now 64-bit) capabilities of OpenGL 3, it seems like some things might 
> be possible, though I'm not sure how to get a GPU to do a global 
> illumination calculation. Anyone know? Tried? Seen any papers?
> 
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-- 
Randolph Fritz • RFritz at lbl.gov
Environmental Energy Technologies Division • Lawrence Berkeley Labs