Workflow Aces Karma to jpg ?

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Hello

Very excited by Houdini 20, I try to switch my workflow from blender to Houdini (except for modeling ).
But I have a problem :

I often need to make "small" jpg exports for my clients, before moving on to the post-production stage (where I work exr to have more possibilities).
I work in aces, and the problem is that when I render from karma, the the opencolor display/View does not apply and I don't know how to do it.
- I did a "raw" test which clearly illustrates the problem
- A test with the Hable tone map in the KarmaRenderSetting (this is the tonemap that is closest to what I have in the viewport)
- The only method I found to have EXACTLY the same rendering as the viewport is by using "render to mplay" and when I do "save frame as", in colorspace I use "bake to opencolorio Display/ View".

Is it possible to use this option WITHOUT going through "render to mplay", because to do lots of rendering, it wastes a lot of time

Attachments:
Capture d'écran 2023-11-11 115452.png (3.6 MB)
Capture d'écran 2023-11-11 115522.png (4.0 MB)
Capture d'écran 2023-11-11 115419.png (3.6 MB)

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I would use the oiiotool TOP or other script to post process the exr images to jpg
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I will check that thank you, but I’m surprised that I can do it from mplay, but not directly from Solaris…
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jsmack
I would use the oiiotool TOP or other script to post process the exr images to jpg
I saw in an other discussion that you recommand to use command line like : hoiiotool -i input.exr --iscolorspace "scene_linear" --ociodisplay "ACES" "sRGB" -o output.jpg

I never use that, can you just explain where or how should i enter this command line ?
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Here's a demo of using the new OpenimageIO TOP to apply the color transform.

Attachments:
oiio_converter_tops.hip (96.0 KB)

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jsmack
Here's a demo of using the new OpenimageIO TOP to apply the color transform.
Thank you very very very very much...

It should be integrated directly to karma setting node...
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jsmack
Here's a demo of using the new OpenimageIO TOP to apply the color transform.

I have tried this oiio converter but it still look so wrong compared to a jpg export directly from Redshift ROP.

I have Houdini 20.0.547 with the default OCIO config shipped with it.
Display set to sRGB - Display & ACES 1.0 - SDR Video

This is driving me nuts, I don't get why Karma doesn't behave!!

First image is karma exr converted to jpg
Second image is a jpg export from RS

Any suggestions?
Thank you
Edited by anbt - Jan. 20, 2024 12:54:38

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test_Karma_exr_to_jpg_from_Topnet.jpg (400.2 KB)
test_Redshfit_Rop.0006.jpg (231.9 KB)

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I also notice a difference if I render from Karma in ROP vs in Solaris
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ok so I think it is because the textures are in .tiff format (except for the displacement map)
Textures coming from GreyscaleGorilla
Edited by anbt - Jan. 20, 2024 15:51:21
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anbt
First image is karma exr converted to jpg

well, was it saved with the same display/view or just converted?
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jsmack
well, was it saved with the same display/view or just converted?

saved with default settings as a .exr, and then converted in AfterEffect with the OpenColorIO plugin


Just linking the other Thread relating to the same issue here for others:
https://www.sidefx.com/forum/topic/94051/?page=1#post-410735 [www.sidefx.com]
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