PBR + ACES for the Substance Suite v1.6

PBR + ACES for the Substance Suite

* check PBR MetalFit for PBR + ACES 2.0

Two filters to treat color textures in physical terms. PBR_SmartFit will automatically bring your albedo map into PBR legal range retaining source colorimetry, details and perceptual middle gray, it applies a curve to the out-of-PBR side so the transform is smooth (unlike a range clamp as in "PBR Albedo Safe Color" node). The ACES_ACEScg filter will convert your color maps into the ACEScg color space (AP1 Primaries) which is a space that closely matches and encompasses the Pointer's Gamut, a reference gamut for real surface colors.

These two can be used separately or in conjunction which is the preferred method for physically accurate rendering. By feeding ACEScg maps into the Substance rendering engine the render output is in ACEScg color space so for that matter I made a new ACESFilm lut that converts the render scene linear space to "Output - sRGB" display referred space. So for all intents and purposes now we are rendering in ACES within Substance Painter. Substance Designer has to wait since currently there is no lut support.

Quick video demonstration: https://youtu.be/n133S4muW6o

For a full guide check the instructions in the download:

v2.0 (only in PBR MetalFit):

- Automatic PBR fix for metallic materials

v1.6:

- Updated EOTF for ACEScg ODT Preview (Base Color view) in the ACEScg filter

- Added ACEScg IDT to ACEScg filter

v1.5:

- Increased coefficients precision

- Improved functions (saturate, reuse nodes, etc)

- Made it available for other shader channels (emissive, specular color and coat color)

v1.1:

- Strict limit option to limit BaseColor low range to 50 (in 8-bit sRGB gamma)

- Input/Output Linear defaulted to True

>> Web: artstation.com/Dogway

>> Github: github.com/Dogway

Copyright (c) 2023 Jose Linares