[Bf-cycles] OSL on the GPU

[Matthew Heimlich]

https://groups.google.com/forum/#!topic/osl-dev/VnLwgR0jPOs

You can see some of the process discussed between Larry and the folks from
Spectral there. They're basically letting OSL run on the CPU, taking the
optimized output from that, and converting it into OpenCL code. In the
years since I assume they *could* have actually ported OSL to the GPU, but
I'd seriously doubt it.

On Fri, Feb 12, 2016 at 7:29 PM, Zauber Paracelsus <zauber at gridmail.org>
wrote:

> Figured there was a catch :-/
>
>
> On 02/12/2016 07:08 PM, Matthew Heimlich wrote:
>
> As far as I know from the last time someone looked into it, it's not
> actually OSL on the GPU, it's more like a conversion at run time from a
> subset of OSL to GPU friendly instructions, and is apparently quite slow.
>
> On Fri, Feb 12, 2016 at 6:50 PM, Zauber Paracelsus <zauber at gridmail.org>
> wrote:
>
>> I had been browsing, and it appears that someone was able to get
>> OpenShadingLanguage to run on the GPU (along with dual CPU/GPU
>> rendering, to boot).  Namely, it was Spectral Studio 13, a
>> physically-accurate and unbiased renderer, like Cycles.  Unlike Cycles,
>> however, it is proprietary.  It does prove that it can be done though,
>> so hopefully such a capability won't be far off for cycles.
>>
>> (I am unable to include a link, as the mailing list's spam filter will
>> reject the email if I do)
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>
>
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