OTOY Forums

Hey, I don't remember reading anything about this and upon search couldnt find anything, but maybe I'm missing some thing-

Is there such a thing as a way to view an exposure map of the render in the live viewer (or anywhere)? I mean an RGB (or any) type of map that shows areas by their level of exposure, to see if you're over-exposing certain areas. Kinda like in any photo editing software, as well as other render engines i've seen.

It really helps with understand if your image is under or over exposed, which is crucial, as well as knowing if the highlights are burnt not just by eyeballing it.

Thanks!

Currently no, but id love to see this. We used to have a info box mapped to the scroll wheel which gave RGB + Luminance values...

But it would be SO handy having color and luminance scopes in some sort of popup so we can track values and balance things more accordingly.

Three years later...
But can you now do this with a LUT, and is this one, available free on the internet helpful?

To upload the file, I had to change its extension, rename the file above to False+Color+LUT.cube for Octane to recognize it as a LUT.

Dark blue means under exposed, and brilliant red over exposed, ideally you plug this into the imager node, and adjust the exposure value so you don't see any of these two colors.

Hi,
if you load the Filmic-Blender config in the Color Management tab: there is a False Color option: ciao,
Beppe

Beep’s suggestion.

A more recommended alternative based on AgX (Filmic being deprecated) is available as a fork, includes false color.

Worth mentioning the enormous range of an offline renderer output (EXR when encoded to a file, as low as 16 bit floating point). While there are reasons to utilize a “false color”, it isn’t an absolute necessity since nothing is “blown out” or “lost” with the aforementioned file format encoding.

For those who want to know more and get their hands on AgX

https://github.com/EaryChow/AgX/blob/main/README.md

elsksa wrote:Beep’s suggestion.

A more recommended alternative based on AgX (Filmic being deprecated) is available as a fork, includes false color.

Worth mentioning the enormous range of an offline renderer output (EXR when encoded to a file, as low as 16 bit floating point). While there are reasons to utilize a “false color”, it isn’t an absolute necessity since nothing is “blown out” or “lost” with the aforementioned file format encoding.

Would like to say AgX is all I use. Elsksa, your site has taught me so much about Octane. And your AgX OCIO config is amazing. (I assume you wrote it). It gives me consistent files from C4D, through AE and into Premiere.

Thank you.

BCres wrote: Would like to say AgX is all I use. Elsksa, your site has taught me so much about Octane. And your AgX OCIO config is amazing. (I assume you wrote it). It gives me consistent files from C4D, through AE and into Premiere.

Thank you.

Much appreciated. Credit goes to Troy Sobtoka for both Filmic and what supersedes it: AgX.
Beyond the consistency, it’s the closest to a befittingly and sane imagery rendition, nearly free from notoriously known flaws. Coming from Troy, we couldn’t except any less.

Well then, thanks to Troy, as well. His AgX configuration is such a welcome and excellent addition to the OCIO workflow. I appreciate both of you very much.