HDR light-match workflow?

[Ihno]

Hi,

I'm playing a little with some keyed studio shots and I have the feeling that I'm doing something wong.

I try to match the lighting, using a linealized grey ball reference photo and the keyed shot, also linealized.

So far so good, but how to compare?
I can load the greyball or the footage as foreground in the vfb. But the color info dialog dosn't recognize the images so I'm not able to compare the colors of my rendering to the filmed ones. Except, open it on a another monitor in PS.
Also, I wanna add the whole sequence in the vfb, so I wouldn't have to search for the right frame every time I want to look at another frame.
And last but not least, the way I use the color corrections (as preview for the grading) I'd want to see them also on the "background Image".

As well-conceived as vray is, there must be a better way to do it. (this is not a feature request, yet )
Could someone push me in the right direction?

[Ihno]

Am I scratching professional secrets here? There must be something more strate forward. Maby play it on a plane and somehow set it up to not get influrenced by the scene? Will have to try that.

[piotrus3333]

this is something you probably need Pdplayer for.

[Ihno]

Thanks for the answer.
Didn't came back to this yet.
I can't believe there is no way to do it in 3ds max except eyeballing.
So, since I don't want to/can't buy Pdplayer, I'd have to compare it in Natron.
Strange..

Just to ensure were talking about the same thing. This is not about to playback the sequence with keyed foreground.
I'd love to have the VFB background/foreground image keep synchronicity to the current frame in the scene.
But the most important thing would be the ability to compare the colors of the footage to the ones of the rendering, while rendering.

[piotrus3333]

you can load the sequence as background (you see color values) and than try with render masks maybe?

[Ihno]

Interesting approach will try. Thanks!