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

[Ignacio Munarriz]

I'm not aware of any physical simulation of light software using gpu, 
but probably it would be interesting to externalize ray-geometry 
intersections in radiance. I think there is already gpu code(as 
libraries or open source) that makes that intersections. Radiance 
instances, meshes, memory management ... would be some issues to solve, 
maybe waiting a bit the ray-geometry intersections will be normalized in 
gpus and it will be easier to send rays and geometry from radiance to 
the cards

El 12/07/2010 19:05, R Fritz escribió:
> 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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>
>