Topics

1

[Max] Bug Reporting / Is this behaviour expected in colour managed 3dsMax versions?

« on: 2025-05-02, 10:55:45 »

max 2024 default ocio config, Corona 12 hf2:

after changing colour management settings to Rendering Color Space: scene-linear rec 709-sRGB Corona locks Internal color space in Development/experimental stuff to sRGB (linear rec 709).
is this behaviour expected and as designed or should it be considered a bug?
as from the very beginning internal rendering math in Corona was always performed in at least Adobe wide RGB space this might lead to some users switching from 3dsMax default ACEScg to scene-linear rec 709-sRGB, expecting legacy-like (gamma 2.2) setup but in fact limiting Corona to pre-Corona, 2011 VRay's colour math with all its lighting bugs and limitations.

2

[Max] Corona Goodies - User Contributions / Alternative OCIO config for 3dsMax. ACES 2.0 and a few other view transforms.

« on: 2025-01-09, 15:29:52 »

- ACES 1.0 SDR-video RGC view transform for environments without OCIOLook support: https://docs.acescentral.com/specifications/rgc/
- ACES 1.0 - SDR Video view transform as three colorspaces: for inverting aces view transform to linear rendering colour space (ocio v1 functionality), creating hdr textures
- ACES 2.0 rev060 GitHub - ampas/ACES_ODT_Candidates​
- ACES 2.0 rev060​ view transform as colorspaces: for inverting aces view transform to linear rendering colour space​
- for Max users: Unity neutral tone-map from Maya
- for Max users: hdr displays removed
- for Maya users: OCIO virtual_display - reads ICC display profile (supported in Resolve etc)
- added some texture colour spaces from ACES cg ocio configs (like srgb encoded AP1 texture etc)
- two AgX view transforms by Troy Sobotka: https://github.com/sobotka/AgX
- Display P3 (apple, srgb transfer function)
- view transforms: filmlook, cinemalook, cameralook - mostly remix/mashup of grades/looks/output luts from popular camera manufacturers
- filmlook01: traditional film emulation
- filmlook02: black and white film emulation
- cinemalook01: classic teal and orange look
- cameralook01: famous K1S1 lut from ARRI https://www.arri.com/en/learn-help/learn-help-camera-system/tools/lut-generator

​
download:
https://piotrus3333.gumroad.com/l/gwavih

3

General CG Discussion / Poll - Do you profile your displays?

« on: 2024-11-28, 12:31:42 »

hello citizen of data driven world,
if You don't mind spending one minute of your valuable time I would be grateful. Brace for advertising content as somebody needs to pay for all this.

poll:
https://strawpoll.com/ajnE18evAnW

Thank you.

4

[Max] Corona Goodies - User Contributions / RED display transforms

« on: 2024-06-14, 14:49:52 »

main Reinhard-based lut and setup attached.

display transform presets from RED:
https://www.red.com/download/ipp2-output-presets

5

[Max] Corona Goodies - User Contributions / ACESOT LUT for Adobe Photoshop

« on: 2023-11-01, 15:29:54 »

This is .csp lut for Photoshop 32bit mode. tested in Corona 10 and in whatever current PS version is.

save .exr from Corona and do your lightmix/comp/whatever in Photoshop with the one and only ACESOT.

it has the difference between view transforms between Corona and PS baked in, so 8-16bit output from Corona will match 8-16bit output from PS.

Corona ACESOT LUT for PS:
https://piotrus3333.gumroad.com/l/dvhkvo

some comparisons between Corona and Photoshop output:
https://forum.corona-renderer.com/index.php?topic=38277.msg218400#msg218400
https://forum.corona-renderer.com/index.php?topic=38277.msg218401#msg218401

6

[Max] Feature Requests / CIE - option to apply LUT without hidden gamma transforms.

« on: 2023-09-19, 12:03:29 »

This would make things so much easier for everybody:

7

[Max] General Discussion / LUTs in Corona

« on: 2023-09-14, 16:15:40 »

is there a way to force Corona to apply LUTs in linear space?

8

[Max] Corona Goodies - User Contributions / AgX in Corona

« on: 2023-09-13, 12:36:19 »

https://github.com/sobotka/AgX/discussions/3

edit: more complete set of AgX luts for Corona in post #8.

9

[Max] Tutorials & Guides / How To Animate Corona Light Mix From One Frame

« on: 2023-02-10, 12:14:16 »

Bit of a gripe - come on Corona Team - this one was sloppy. Please consider updating the video: https://www.youtube.com/watch?v=U9Ym2QHTm4Q.

Do not use Gamut node on Fusion page, just select your exr layers. Use Adjustement Clip on top of your lightmix with ACES Transform effect. Adjustments to lights do on Color page.

10

[Max] Corona Goodies - User Contributions / Chaos Corona within ACES color management

« on: 2022-07-14, 18:35:32 »

https://youtu.be/LKNlHoKOAtU

LUTs attached:

edit: added mP_CoronaACESsplit_aces1.3rgc.zip

11

[Max] Corona Goodies - User Contributions / ACES-like parametric tone mapper. Even in Photoshop.

« on: 2022-07-05, 22:32:13 »

12

[Max] Corona Goodies - User Contributions / Tone mapping with LUTs. Corona / Photoshop / Affinity Photo

« on: 2022-02-09, 02:22:55 »

Full tone mapping solution in just one LUT. simple and consistent between applications.
.3dl >> CIE
.csp >> PS/AP
old trusty formula for filmic look. falls somewhere between aces an fstorm. this one is ageing extremely well.

13

General CG Discussion / Simple non-destructive tone mapping

« on: 2021-05-18, 22:49:40 »

hopefully something useful, channel mixer used for tone mapping:

14

General CG Discussion / Self updating masks in Photoshop

« on: 2018-03-24, 21:24:07 »

Quick tip for compositing in Photoshop:

15

[Max] General Discussion / chromatic aberration in Corona

« on: 2018-02-15, 19:49:59 »

I've been rendering some tests lately regarding feasibility of creating that sort of effects in render without any kind of post. render, save it, done.
anybody have experience with that in Corona? (not colored aperture maps - I need something realistic)

question: any chance of setting IOR below 1? when I'm inputting it as color - value of 0.9 gives me IOR 1.1