Difference between saved JPG and copy paste from VFB to Photoshop

[Vizioen]

Why is there a difference (sometimes small, sometimes bigger) between a copy and paste directly from the VFB to photoshop, or a saved JPG. My view settings in VFB are Gamma 2.2, previously they were sRGB and the difference was a lot bigger, but even with 2.2, there's some difference. Not THAT noticeable. Is it because of JPG compression? I tried other formats, but there's always some minor difference.

Also is it advised to set it to Gamma 2.2 in the VFB? or sRGB?

[StufishIT]

The main culprit is likely to be .jpg ! - you can save the same image with an awful lot of different sizes as jpgs of different settings. Personally I would never save anything (other than a copy for low quality distribution) in a 'lossy' compression. Try sticking to .tif or .png - but make sure you are selecting the same bit depth all the time.. But I suspect if you save a screen grab - copy & paste - (rather than a proper save) you may have grabbed something affected by your display settings and saved that. Your choice as to Gamma - depends what you want to do with the images - but I would strongly suggest you make a choice and stick with it!

[Vizioen]

Well I have a bit of a weird workflow when it comes to mocking up a render. When it's done, I just copy and paste the beauty in Photoshop, if I feel I need some render channels I copy paste those as well while I work on it, eventhough I saved those as .tga. The common file is always JPG as I have the elements as .tga anyway.

I'm reading in a lot of places that 2.2 is the better way to go. I don't work in VFX (archviz only) and my renders are quite balanced already so I don't need extreme flexibility in the end.

[Morne]

Do you find the same differences when saving to .tga and copying/pasting from vfb to psd, or its only with jpg?

[piotrus3333]

no perceptible difference here between between ‘copy to clipboard’ and saved jpg. all thanks to compressed blocks of pixels. and with saved png same pixels differ by 1/256 rgb value max - roughly 8 times less on an image I checked.