On 8/22/23 16:55, Chris R wrote:
> I do use his camera macros (v1.0), in my scenes.  The uploaded one is not using
> any focal blur, (yet).  I looked through the code and I don't see anything
> related to ISO.  I would imagine it could be part of his stochastic focus code,
> introducing noise based on ISO and lighting conditions on the focal plane, but I
> didn't recognize anything like that.

Ah alright - probably my failing memory. Might explain why my search 
turned up nothing useful.

So, mostly you are looking to introduce noise in the resultant image and 
more noise the lower your ISO 'film' quality? If close, there is 'crand'
built into POV-Ray itself - but the noise introduce is not predictive 
today.

Hmm, I wonder if the cells pattern scaled really small as a filter 
pigment on a mostly transparent plane in front of your camera might work 
- at least as a way to introduce some noise over the whole image? 
Suppose ideally we'd only activate the ISO feature in the in focus 
regions...

Bill P.

Aside:

My search did turn up:

http://megapov.inetart.net/manual-1.1/global_settings.html#film_exposure

which looks like an idea worth me playing with for a while as I've been 
spending time trying to come up with ways to avoid high dynamic, channel 
ranges internal to POV-Ray (povr).

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