Messages

1

[Max] General Discussion / Re: Gamma Correction Tone Mapping Operator Removed - Bring it back!

« on: Yesterday at 15:21:05 »

if "avoiding user mistakes" is THE strategy - was anything done about Tone Curve after this thread:
https://forum.corona-renderer.com/index.php?topic=40616.0

an updated tooltip or something?

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[Max] General Discussion / Re: Gamma Correction Tone Mapping Operator Removed - Bring it back!

« on: Yesterday at 11:32:13 »

For what it's worth - Gamma operator lets you use lut files in Image Editor in the same manner as in every other software. just makes things simpler for the time being.

3

[Max] Feature Requests / Re: Improved support of max colour management

« on: 2024-04-22, 12:42:03 »

Hello Piotrus,

what do you mean by "float colormap.additionalGamma = -1.2" ?
do you type this in maxcript listener ? (when i type this, i got a bunch of errors)

thanks!

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[Max] General Discussion / Re: Gamma Correction Tone Mapping Operator Removed - Bring it back!

« on: 2024-04-22, 12:06:44 »

I would love to hear the reasoning behind that decision.

5

[Max] I need help! / Re: Render multiples camera matching

« on: 2024-04-19, 16:06:35 »

3dsMax State Sets?

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

« on: 2024-04-18, 11:24:12 »

More of AgX by Troy Sobotka - this time his Resolve version of it (quite different) married with a film look from Arri:
https://forum.corona-renderer.com/index.php?topic=41947.msg223544#msg223544

note: it does require a string option to turn off VFB's sRGB view lut so might be a bit more cumbersome to use.

7

[Max] General Discussion / Re: Roughness implementation correct?

« on: 2024-04-18, 10:40:34 »

The thing I find different about CoronaPhysicalMtl and energy conservation is actually too much energy reflected at low Base Color values like 0.02-0.04.

I'm talking nonsense - CoronaPhysicalMtl is actually a bit darker than StandardSurface.

What is odd though is that CoronaPhysicalMtl returns at F0 (furnace test, GeoSphere mesh, Base Color 0.18, full roughness, ior 1.5) less than 0.18 float.

Compared with VRayMtl here:

8

Gallery / Re: Bokeh is your Friend

« on: 2024-04-18, 08:47:28 »

I think under and over compensated bokeh is like axial chromatic aberration - it is reversed behind and in front of the focal plane: if it’s over compensated behind then it’s under compensated closer to the lens.

https://blenderartists.org/t/advanced-optical-experiments/695835
this is what I was playing with few years ago. might still be the best 3D implementation of lens aberrations.

9

[Max] General Discussion / Re: Roughness implementation correct?

« on: 2024-04-17, 15:28:56 »

The thing I find different about CoronaPhysicalMtl and energy conservation is actually too much energy reflected at low Base Color values like 0.02-0.04.

10

[Max] General Discussion / Re: 3DSMax 2025 ACES and Corona Render

« on: 2024-04-17, 10:23:12 »

Thank you.

11

[Max] General Discussion / Re: 3DSMax 2025 ACES and Corona Render

« on: 2024-04-17, 08:44:13 »

Please note that the below is not yet fully decided, so I cannot provide you with very specific details:
We will soon release a Corona 11 Hotfix 2 which will support 3ds Max 2025 and will assume the ACES/OCIO workflow as the new default with some kind of automated or semi-automated way of correctly displaying the image in the VFB. We are not sure how exactly this will be done, but we will do it in the usual Corona style so that you don't have to worry about it. :)

the changelog of hotfix 2 is a bit vague about it - does display transform from 3ds' ocio setup works with Corona or not yet?

12

[Max] Feature Requests / Re: Improved support of max colour management

« on: 2024-04-09, 12:02:53 »

Sorry for the slow reply piotrus3333!

I must admit I'm not very knowledgeable on the process of creating LUTs from resolve.
Would it be a case of using Resolve's CST's to go from linear to AgX and exporting that as a LUT?

I'd definitely like to explore this more - we've been using your AgX LUT pack for a while now and have been getting some great results.

Try the DCTL version of AgX first (link above). I consider it much better but this is all quite subjective. Note: DCTLs only work with Resolve Studio.

This particular DCTL only accepts Arri Wide Gamut 3 with LogC3 encoding as input - there is full drop down menu with other inputs but only this one combination works.
So your raw render from Corona would need CST from srgb linear to awg3 logC3 + AgX DCTL.
AgX DCTL will take you much farther than AgX Base (from my luts) to final look but you should still grade to taste (in LogC3, before DCTL).

Use LUT Cube Analyzer node in Fusion for lut creation.

I'm attaching a crude example (works through CineonLog - Logarythmic in Corona LUT layer so clips the highlight at 13.52 float, should be ok for typical archviz scene)
(lut needs string option, essential for Corona to turn off all the gamma shenanigans in frame buffer: float colormap.additionalGamma = -1.2)

edit: this lut takes raw render from Corona, transforms it through AgX Resolve picture formation as the author calls it to display it on srgb display adding one of Arri's looks.

I hope this is somewhat helpful.

13

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

« on: 2024-03-26, 18:51:14 »

Thank you for your answers! Is it useful to add ocio Vray renderer to environment variables?

VRAY_VFB_OCIO - no.
OCIO - yes, if you are using only/mostly one ocio config.

14

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

« on: 2024-03-26, 15:37:08 »

Hello, do you need to add OCIO configuration environment variables in the corona renderer?

no, just luts.
created with legacy gamma setup in 3dsMax 2024 in mind.

15

[Max] Feature Requests / Re: Improved support of max colour management

« on: 2024-03-22, 13:48:29 »

We're looking forward to seeing this implemented. Recently we have been using piotrus3333's LUTs setup to achieve this and have been getting great results, but it would be nice to have it as a "set and forget" option for the rest of the team.

If you like the feel of AgX please consider checking this:
https://github.com/sobotka/AgX-Resolve
this is THE AgX by Sobotka. ocio version is the simplified one. you should be able to create better luts from this. it's based on arrilogC3 encoding so I guess as a bonus (if porting to Corona) you get an easy access to all the arri's looks library.