[Bf-committers] Vignette node for Blender's Compositor

Diego Gangl dnicolas at gmail.com
Thu Mar 5 16:10:37 CET 2015

Hi guys,
We also have to consider: more nodes = more code = more bugs and less
Speeding up (if possible) the blur, mix and ellipse mask nodes would be a
better improvement for vignettes IMHO.


2015-03-05 11:55 GMT-03:00 Troy Sobotka <troy.sobotka at gmail.com>:

> On Mar 5, 2015 6:13 AM, "Johnny Matthews" <johnny.matthews at gmail.com>
> wrote:
> >
> > Oh you burned me so bad there.
> It wasn't intended as a burn, and I regret that you saw it as such.
> The idea that a multiplication isn't complex was directed at the suggestion
> that there would be “efficiencies” if coded at a more “atomic” level; a
> node that merely performs a multiplication would not see such gains.
> I am also curious why you discredited Mr. McSween's line of reasoning
> above? If one examines industry leading tools such as Nuke, one will not
> find a multiplication blur vignette node.
> While this might seem a curious omission in an industrial imaging
> application, we can wonder if the vignette node:
> A) Does the node model the dispersion and chromatic aberration
> characteristics of a lens near the periphery?
> B) Does the node, when dealing with A above, manage variable primary
> reference spaces correctly?
> C) Does the node offer compression adaption for anamorphic or other
> non-spherical lens representations?
> D) Does the node offer variable density of the light occlusion?
> E) Does the node adapt to the variable distortions of a lens model?
> Most of these facets are unique and complex, and as such, would likely be
> modeled into a more granular set of nodes, which would be welcome I am
> certain. The nuances of each of these would require an understanding of
> optics to model correctly, and designed to some of the standards already
> relevant for a visual effects workflow.
> Hopefully the depth of your knowledge can cover some of the above issues
> and a more granular set of nodes is plausible.
> With respect,
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