On 13-1-2010 22:29, nemesis wrote:
> andrel escreveu:
>> On 13-1-2010 21:52, nemesis wrote:
>>> andrel escreveu:
>>>>>> What I think is that ATM GPU's are useful for trangulations and 
>>>>>> that the  result is near real life. As far as I have heard the 
>>>>>> rendering is less physical correct and more is faked. I though 
>>>>>> they were a bit lacking in multiple reflection and refraction, in 
>>>>>> media and possibly also in versatility of procedural textures. I 
>>>>>> am not a gamer, so I don't actually know for sure.
>>>>>
>>>>> I show you a link for a video of a physically-based path tracer 
>>>>> running on GPU and yet you talk about limited game tech...
>>>>>
>>>> No I didn't.
>>>
>>> Those words are yours.
>>>
>> Which?
> 
> I think is that ATM GPU's are useful for trangulations and
> that the  result is near real life. As far as I have heard the
> rendering is less physical correct and more is faked. I though they
> were a bit lacking in multiple reflection and refraction, in media
> and possibly also in versatility of procedural textures. I am not a
> gamer, so I don't actually know for sure.
> 
So, point me to where I talked exclusively about game tech.

But let me try to explain again: what you pointed at and other things I 
have seen so far is that GPUs are used for a limited set of primitives 
only, modelling a subset of physical behaviour. Even if they claim to be 
physically accurate in practice they aren't, nor is POV for that matter. 
  Again what I have seen and understood is that up till now POV is more 
physical complete (disclaimer: I have not seen everything that is out 
there.). Hence POV still has a place.
In order to get more 'realistic' games the GPUs have been optimized to 
render textures and fake reflections and shadows. They can be used as 
FPU replacement for certain tasks, but they are not perfect for general 
processing (yet). That is as far as I know. There may have been 
significant advances that I have missed because I am not a gamer and 
hence do not follow the developments closely. OTOH with every new 
development in GPUs there is bound to be a POVer somewhere to draw 
attention to the fact that POV is still not using GPUs.

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