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AgX_vs_Filmic AgX (Left) vs Filmic (Right)

What?

Eary's AgX is an OCIO v2 configuration made with the intention to replace Blender's default config, to give Blender a better color management and image formation for the upcoming Spectral Cycles.

The config was built more specifically for Blender, but other software that supports OCIO v2 should also be able to use it.

The featuring image formation (view transform) is AgX, which is targeted as a replacement for "Filmic".

"AgX" the name is a pseudo-chemical notation of silver halide, commonly used in photographic film, therefore, AgX is an alias of Filmic.

AgX Image formation does two things

This config also comes with a different colorspace naming scheme, but with backwards compatibility setup with OCIO v2 feature of aliases, so that texture colorspaces in old .blend files will get auto-converted to the new names.

One of the frequently asked space names is:

Why?

Because the current Filmic has issues like the Notorious Six, meaning Filmic collapses all colors into six before attenuating to white. Filmic also doesn't have the capability to handle wider gamut render produced by wider working space, spectral rendering, real-camera-produced colorimetry etc.

AgtX_vs_Filmic Sweep AgX (Left) vs Filmic (Right)

How?

  1. Download the latest version of Eary's AgX, Replace your current OpenColorIO configuration in Blender with this version.

  2. The Blender OpenColorIO configuration directory is located in:

BLENDER/bin/VERSIONNUMBER/datafiles/colormanagement Move the existing colormanagement directory to a backup location, and place the contents of this repository into a new colormanagement directory.

  1. From within the Color Management panel, change the View to AgX, and choose the artistic Look of your desire.

EDIT: This version of AgX has been merged to Blender 4.0 main.

View Transforms

The config includes the following view transform:

False Color ranges

Different from False Color in Blender 3.6 and before, or the Filmic-Blender config, the false color here is a post-formation closed domain evaluation. Therefore, all values below will be linearized 0 to 1 value written in percentage.

[0.0, 1.0] Closed Domain LinearColor
Low ClipBlack
0.0001% to 0.05%Blue
0.05% to 0.5%Blue-Cyan
0.5% to 5%Cyan
5% to 16%Green-Cyan
16% to 22%Grey
22% to 35%Green-Yellow
35% to 55%Yellow
55% to 80%Orange
80% to 97%Red
High ClipWhite

For exposure-stop range reference, here is the exposure sweep: ea6deefe57f43e8684b6be27e3964fae_d676374d-3b8b-4e65-b048-5a17fd083a7f

Looks "Looks" are artistic adjustments to the image formation chain.

Colorimetric Information