[Bf-compositor] Clamping (Mix, Math, RGB Curves)

[Bartek Skorupa (priv)]

So it again seams I don't get the basics…
If so, let's again find another platform to discuses the matter.

Bartek Skorupa

www.bartekskorupa.com

On 23 maj 2014, at 23:21, Troy Sobotka <troy.sobotka at gmail.com> wrote:

> 
> On May 23, 2014 1:56 PM, "Bartek Skorupa (priv)" <bartekskorupa at bartekskorupa.com> wrote:
> 
> > When I say: "clamp blacks" I always mean: set every value below 0.0 to 0.0.
> > When I say: "clamp whites" I always mean: set every value above 1.0 to 1.0.
> > Every compositing artist will know what I mean.
> 
> If we can generate a clamp / scale node, I am all for it.
> 
> I am saying there is no concept of white in a scene referred model, and as such, you have to be careful as to not write nodes that break the system.
> 
> It is that simple. No white. No brighter than white. So sorry, “Every artist...” is actually “Every artist unfamiliar with HDR work.”
> 
> So a clamp node _must_ not make the erroneous assumption that 1.0 means anything special, and rather provide for an arbitrary value range.
> 
> If this all seems like speaking an alien language, it is precisely why I chimed in and said “Whoa.”
> 
> There are already nodes that are broken because of erroneous assumptions. It would be a shame to make more.
> 
> With respect,
> TJS
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