[Bf-funboard] New compositing and VSE monitor tools

[David McSween]

Douglas did you know that the UV Image editor has scopes available as a
tool panel? Simply select a node viewer and the output from color changes
will be reflected in those scopes. The color space issues are non-trivial
in the VSE as I'm told that it must perform its transforms as quickly as
possible to achieve real time playback. While Troy's language may seem
opaque he really knows what he's talking about so you would do well to
invest time to understand what he means.

Cheers
David

On Fri, Feb 19, 2016 at 8:27 PM, Knapp <magick.crow at gmail.com> wrote:

> On Fri, Feb 19, 2016 at 4:07 AM, Troy Sobotka <troy.sobotka at gmail.com>
> wrote:
>
> > There are several problems with this at the moment:
> >   1) The VSE should use a reference space that is linearized. Ideally it
> is
> > scene referred, linear. Currently it is display referred nonlinear. Every
> > operation regarding compositing therefore is fundamentally broken.
> > Regarding grading, this impacts alpha bound plates etc.
> >
>
> I don't understand this but I will take your word for it. Why don't we fix
> it?
>
>
>
> >   2) The VSE in terms of "ranges" should be, given it works with Cycles,
> > utilizing the same reference space that leverages the full scene referred
> > values. I'm relatively sure right now it has some cripples on the display
> > referred ranges, making the concept of grading a nightmare.
> >
>
> Again, same comment.
>
>
>
> >   3) Given (2) above, Blender as a whole needs to have colourspace
> > selectable UI controls. That is, if the reference is scene referred
> linear
> > for example, the curves tool needs to be able to have whatever imager
> > driven transform applied, per node. This would make it viable to grade
> with
> > curves on a Cycles render, as an example. As it is now, if middle grey is
> > mapped at 0.18 (which isn't always necessarily the case), about 18% of
> the
> > curve region covers the entire perceptual range from display referred
> black
> > to display referred middle grey. Similar issue with dealing with above
> > middle grey roll-off.
> >
> > As a viable path forward, migrating the VSE to a "strip view", as well as
> > adding a "grading node" toggle to go with the three existing modes, would
> > probably work toward remedying this situation.
> >
>
> I think I got that bit but not even sure here. It would be wonderful and I
> would think important to do color grading in Blender.
>
>
> > With respect,
> > TJS
> >
> >
> How about adding these monitors to the compositor as node outputs viewers?
> It is true that we have a couple of these monitors in the VSE but even
> there they are very primitive compared to the shots in the tutorial. There
> examples of have R, G, and B channels viewable all at once and then
> adjustable is a powerful tool that I would like to have!
>
> Thanks for your time!
>  Douglas E Knapp
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