Messages

1

[C4D] General Discussion / Re: Multiplied alpha

« on: 2025-03-05, 10:16:20 »

The image is a Photoshop composition. The object was rendered with alpha and composed with the background in Photoshop. The object sits on a plane, and in addition to standard lighting, I used HDRI/SKY lighting to create ambient lighting. I will try to disable visibility of the sky. It might help.

black background is a must.
also look at photoshop settings and make sure alpha you are using is saved correctly (for example by default corona for 3dsmax saves alpha to integer colour file formats with wrong gamma - attached)

2

[C4D] General Discussion / Re: Multiplied alpha

« on: 2025-03-04, 14:06:50 »

is the image you attached a crop from your render?
are you rendering on white background??

3

[Max] General Discussion / Re: Different Colors Between Corona VFB and Saved Image

« on: 2025-03-03, 13:00:34 »

and I don't think suggesting pokoy to log something again for you is a good idea. I guess he did that in 2015:
https://forum.corona-renderer.com/index.php?topic=9346.msg60702#msg60702

4

[Max] General Discussion / Re: Different Colors Between Corona VFB and Saved Image

« on: 2025-03-03, 12:57:04 »

it has been logged already:
https://forum.corona-renderer.com/index.php?topic=40353.msg214345#msg214345

5

[Max] General Discussion / Re: Different Colors Between Corona VFB and Saved Image

« on: 2025-03-03, 12:17:52 »

Does this sound better?

The reason why there are differences between the VFB and the saved image previewed in Windows viewer or Photoshop is that 3ds Max and Corona are not color-managed or "color-profile aware" while the viewer and Photoshop are.

spot on.

6

[Max] General Discussion / Re: Different Colors Between Corona VFB and Saved Image

« on: 2025-03-03, 11:59:38 »

read Photoshop manual.
read what D Fosse writes on adobe support forums.

your default settings Photoshop shows the right colours if your image from Corona is srgb tagged.
your default Corona does not show it correctly.

7

[Max] General Discussion / Re: Different Colors Between Corona VFB and Saved Image

« on: 2025-03-03, 11:52:45 »

I changed the photoshop color management to my monitor´s one (DELLU3223QE) and it worked fine.

Then I guess case closed. :)

how is it possible that Corona team is still misinforming users on this subject?

"case closed" above means: you've just turned off colour management in Photoshop so it matches non-managed Corona. and in the process you used a profile made for your type of display so it sounds correct. right?

8

[Max] I need help! / Re: HDRI horizon reflections

« on: 2025-01-30, 08:32:34 »

wouldn't it be easier to photoshop the environment map? just blend the sky part you need with the bottom part of some other map.

9

[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

10

Hardware / Re: Color space/mode

« on: 2024-12-20, 17:23:38 »

Im just reading a few threads on this topic at the moment trying to ascertain how to get consistent sRGB or AdobeRGB outputs from Corona now that colour management is a thing.
This seems to be the most recent thread discussing it and sorry to hijack it for a slightly different question. But If someone who has a better understanding than I could post some advice on what settings to use within colour management and then what to do within photoshop to ensure consistency between the VFB and the image im seeing in photoshop that would be great.

Juraj, i followed some steps from a post you made a few years ago which were very helpful thank you. But now colour management exists in max is there a better way to ensure consistency? Or does the missing profile assignment in the max save system still dictate that the below is the best way?

This is the comment i mentioned above.

Quote from: Juraj on 2021-03-05, 21:30:18

This is correct workflow for this monitor for 3dsMax/Corona.

1) Monitor OSD Menu: Select sRGB mode. Then adjust brightness to your liking. (Fun fact: Calibration is also done to exact brightness levels, but if you move it +/- 50perc. the difference in accuracy is not drastic).
2) Type Color management into taskbar in Windows, select your monitor, check "Use my settings" and select "sRGB" ICC profile. Set "Use as default".
3) When loading any rendering into Photoshop, you don't need to do anything if your settings are set to "Don't Ask". It will stay unmanaged and you only need to "Assign" sRGB profile at the end of export, for examply when saving to final file. Don't convert to any other profile.

The above workflow doesn't work for high-gamut displaying (DCI-P3, HDR workflow,etc..) or printing (AdobeRGB, LAB,etc.). But since 3dsMax & Corona are not color managed (Autodesk Maya and Vray for example are), this is the best scenario to use right now. Least headaches. Colors are always correct, you're just not using wide-gamut capability, which is ok since most devices are sRGB only, even today.

adobeRGB display is in the default OCIO config.

11

[Max] Bug Reporting / Re: Tonemapping Order/Behaviour

« on: 2024-12-17, 16:42:08 »

a suggestion regarding saturation:
go to Resolve, save a lut from Color page - I’m sure you can find saturation adjustment that fits your needs.
use lut opacity, I think this should be enough.
no need to wait 5 more years.

12

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

« on: 2024-12-06, 18:29:43 »

Since you're an expert on this, what's your take - why is OCIO support in Max poor? I have no idea (still on max 2021 here), asking out of interest and would like to hear your opinion.

no idea. I guess not the priority at the moment. Maya has still the same config from 2022 version for example. maybe the idea is ocio configs should be personalised anyway.

the colour focused Resolve only recently got full (or almost full) ocio support so it’s not like autodesk is an outlier.
but for reasons unknown they ship Max with one display transform (aces sdr), Maya with two yet VRED gets a few, AgX included.

important functionality missing:
OCIOLook transform (important for ACES)
virtual_display (important for everybody using icc profile)

13

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

« on: 2024-12-06, 17:21:37 »

OCIO sytem has support for ICC profiles. it’s just Max that does poor job supporting OCIO.

one way of going around it is adding the same functionality but with luts in custom ocio config.

14

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

« on: 2024-12-06, 11:14:35 »

I'm fairly new to the calibrating / profiling game (if you don't account for hardware calibrating) and what I'm noticing is that calibrating / profiling is just one part of the game. The other part is setting your applications to work correctly according to the profiles / calibration used.

to be fair the ICC system is in theory quite "behind the scenes". profiling software usually takes care of loading the profile into Windows and done. everything just works. obviously it works as long as you stay within the ICC ecosystem...

15

Hardware / Re: Color space/mode

« on: 2024-12-06, 10:07:50 »

Corona does not embed color profile information, unfortunately, I am not even sure if with 3ds max save dialog (Corona uses it under the hood) it is possible.

For 3ds Max color management - everything should be supported by Corona, unless there is a warning message about it (e.g. specific rendering color space).

If everything is supported than maybe you would be interested in this:
https://forums.chaos.com/forum/chaos-common/chaos-common-public/1221708-alternative-ocio-config-for-max-and-maya-because-there-is-more-to-display-transforms-than-aces-is-able-to-offer#post1221708

it is meant to replace your default ocio config from Max. just expanding on the defaults so this will not break any scenes (unless you are on exotic hdr display, I removed those for now as this config is based more on what you can find in Maya - different display list)

I will add an option to load your ICC into max via ocio config soon.