topic "color_space" parameter is not exported to ass in Arnold for Maya Forum

"color_space" parameter is not exported to ass

kitaguchi-kazuya — Wed, 10 Jul 2024 11:57:39 GMT

When you exported a shader graph including aiImage nodes to an ass file from "Export Selected Shaders" command,

the ass would have no "color_space" parameter regardless of changing the default value.
This is obsolutely a bug.

My environment is MtoA5.4.2.1 on Maya2024.2.

Re: "color_space" parameter is not exported to ass

kitaguchi-kazuya — Thu, 11 Jul 2024 03:06:51 GMT

Case1: Arnold > Scene Export > Export Selection to .ASS

image { name aiImage1 filename "C:/Users/#####.png" color_space "sRGB" filter "closest" multiply 0.314999998 0.314999998 0.314999998 offset 0.5 0.5 0.5 missing_texture_color 0 0 0 1 }

Case2:Arnold > Shaders > Export Selected Shaders

image { name aiImage1 filename "C:/Users/#####.png" filter "closest" multiply 0.314999998 0.314999998 0.314999998 offset 0.5 0.5 0.5 missing_texture_color 0 0 0 1 }

Re: "color_space" parameter is not exported to ass

Stephen.Blair — Thu, 11 Jul 2024 15:18:45 GMT

In case 1, you're also exporting a color manager node, right?

MtoA does not export image.color_space if there's no color manager. I guess that's a bug, or it was a design decision.

Re: "color_space" parameter is not exported to ass

kitaguchi-kazuya — Fri, 12 Jul 2024 02:12:42 GMT

@Stephen.Blair wrote:
In case 1, you're also exporting a color manager node, right? .

Yes.I exported a color manager node as well.
I noticed the following about "Export Selection to .ASS".
If I turned off "Color Manager" in the options dialog and then pressed "Export Selection",
"Color Manager" option in the next file dialog was turned on again.

I figured out that MtoA didn't export color space parameter when a color manager node was not exported.
But this specification was not good for me because a definition in a shader graph was not able to be exactly represented.

Re: "color_space" parameter is not exported to ass

kitaguchi-kazuya — Fri, 29 May 2026 07:22:48 GMT

This issue still occurs when exporting to ASS or USD.
There were no issues with MTLX.

Re: "color_space" parameter is not exported to ass

Stephen.Blair — Tue, 02 Jun 2026 17:57:02 GMT

Yes, the ticket is still open.

MTOA-2045
Export Selected Shaders does not set image.color_space