Difference in adjusting exposure in vfb and in camera

[Alex_M]

Hmm...seems likely but I would defer that question to Vlado and the crew here. If I was doing all post-processing exclusively in another program, I think I would most likely skip VFB adjustments altogether and bring the raw 32-bit float rendered image directly to post and adjust there.

I just tested "Force color clamping" on a saved 32 bit EXR and it looks that it's purely for display purposes in VFB, it didn't have any adverse effect when I loaded and played with the image in After Effects. But let's hear what the Vray guys have to say too.

Thank u very much. Yes, i believe the same and that is the reason that i do not use VFB, but someone more appropriate on this matter can enlighten us Collaborating with other freelancers, i ve seen all sort of other workflows and because we do have our own, i wanna know what restrictions apply in all these small details cause we heavily rely on post.

Some people send me files with heavy VFB adjustments as i already mentioned, others heavily tonemapped images and I try to respect how each individual artist operates in order not to confuse/restrict him.
But if stuff like this limits our post ability, i must be more demanding on how I want the vray settings.

I would ask them to send unclamped 16 or 32 bit floating point images with the color correction disabled in the VFB along with a saved "Global color corrections file" (.vccglb) and/or a .cube LUT file depending on where you want to reapply back their color corrections. if you want to reapply them in VFB, the .vccglb file will be best option as you'll have more freedom than using the .cube file. If you want to apply their color corrections in another software such as After Effects, Nuke etc. then the exported .cube LUT file is the thing you'll need. You can save these preset files from the button "Globals..." above the Exposure slider. Just click it and then click "Save". This way you can have the original image without color corrections and you can also reconstruct it with their color corrections for further adjustments on your side.

[Alan Iglesias]

Some people send me files with heavy VFB adjustments as i already mentioned, others heavily tonemapped images and I try to respect how each individual artist operates in order not to confuse/restrict him.
But if stuff like this limits our post ability, i must be more demanding on how I want the vray settings set up.

As a long-timer (old-timer!) on the project management side, I would (and do) insist that anyone working for/with me in 3D needs to have an advanced enough understanding of cameras and lighting to come reasonably close to an acceptable exposure without radical post (VFB or otherwise) adjustments. When this happens, it seems that very often folks are "fighting" the renderer instead of making it work for them.

In the past I have found that if someone was not clear on such things, I could fairly easily straighten them out with some basic instruction in workflow and lighting/camera/material set-up. It's not all that difficult to understand when you look at it logically and carefully with the will to learn and understand.

Not everyone has a background in photography as I (and many folks here) did, and very often just going over the basics and how they relate to what we do is enough to get them to a point where they are understanding the whole thing on a much deeper, more workable level.

Also, getting into 3D back in the 80s allowed me to understand basic rendering concepts right from where they were relatively quite simple, allowing me to grow in my knowledge as the industry grew, making it relatively easy to show folks how we work this "magic" called 3D.

Best,

-Alan

[thanulee]

As a long-timer (old-timer!) on the project management side, I would (and do) insist that anyone working for/with me in 3D needs to have an advanced enough understanding of cameras and lighting to come reasonably close to an acceptable exposure without radical post (VFB or otherwise) adjustments.

Balances are delicate in my country! People with strong personalities hehe. Especially when i have to say to a guy that has twice my years in experience how to setup things. And its even harder if the guy against u has the mentality of working without supervision for many years, or even worse, consider himself a great artist
We try to leave everyone do his/her own things as long as we are ok with the result in order to avoid conflicts and further delays. Ideally when we hire someone we expect to have the damn thing delivered, but many times this is not the case. Often i find myself correcting other people's files without even telling em. Project management is hard, so i try have as much technical knowledge as i can, so i can debate about stuff with proper arguments

[Alan Iglesias]

Balances are delicate in my country! People with strong personalities hehe. Especially when i have to say to a guy that has twice my years in experience how to setup things......

I hear you and feel your pain. We all have our challenges...

-Alan

[Alan Iglesias]

...Especially when i have to say to a guy that has twice my years in experience...

Reading this I realize that there is no such thing as a guy who has "twice my years in experience" in 3D! I just knew there was some good reason for getting old!

HA! Thanks for making an old guy feel good,

-Alan

[thanulee]

Reading this I realize that there is no such thing as a guy who has "twice my years in experience" in 3D! I just knew there was some good reason for getting old!

HA! Thanks for making an old guy feel good,

-Alan

and imagine im not that young or unexperienced myself by saying that. That should make u feel even better!

[squintnic]

and imagine im not that young or unexperienced myself by saying that. That should make u feel even better!

Can I ask what film you are using in your camera?

[Alan Iglesias]

and imagine im not that young or unexperienced myself by saying that. That should make u feel even better!

HA! I better not laugh too much or my teeth might fall out....

-Alan