Compositor not reading layers/passes from Multilayer OpenEXR Files created inr 3D packages #54137

New Issue

Manuel Albert · 2018-02-22T22:00:30+01:00

Manuel Albert commented

2018-02-22 22:00:30 +01:00

Windows 10 Home 64bit and GeForce GTX 980M

Broken: basically any version
Worked: (not known)

The compositor does not read layers/passes from Multilayer OpenEXR Files created outside of blender. I am not sure if this is considered a bug, but I guess it should work and I couldn't find any information otherwise.

To reproduce:
Open the attached blend (the OpenEXR file created with Vray 3.6 for Cinema 4D) and see compositor Input Image Node and the available passes/layers.
There are quite a few passes present in the file such as velocity, multimattes and others. Other tools such as krita, djv-imaging are able to display the layers and the attached frame is a background image from an interior car shot hence not all the IDs, Masks are present.

![TPS_Sh05_Feldweg_Emv_v01_alb__1_0010.exr](https://archive.blender.org/developer/F2341659/TPS_Sh05_Feldweg_Emv_v01_alb__1_0010.exr) [multilayerEXR_v01.blend](https://archive.blender.org/developer/F2341665/multilayerEXR_v01.blend) Windows 10 Home 64bit and GeForce GTX 980M Broken: basically any version Worked: (not known) The compositor does not read layers/passes from Multilayer OpenEXR Files created outside of blender. I am not sure if this is considered a bug, but I guess it should work and I couldn't find any information otherwise. To reproduce: Open the attached blend (the OpenEXR file created with Vray 3.6 for Cinema 4D) and see compositor Input Image Node and the available passes/layers. There are quite a few passes present in the file such as velocity, multimattes and others. Other tools such as krita, djv-imaging are able to display the layers and the attached frame is a background image from an interior car shot hence not all the IDs, Masks are present.

Manuel Albert commented

2018-02-22 22:00:30 +01:00

Added subscriber: @ManuelAlbert

Manuel Albert commented

2018-02-22 22:00:46 +01:00

This comment was removed by @ManuelAlbert

*This comment was removed by @ManuelAlbert*

Manuel Albert commented

2018-02-23 13:55:04 +01:00

A colleague of mine, when further investigating the issue, wrote:

"Vray/Cinema 4D writes the full R G B channel name which means "AO.red, AO.green, AO.blue" but Blender seems to need "AO.r, AO.g, AO.b" instead."

And further notes:
"If I manually change channels in the EXR-Header that the colors end with 'r' 'g' and 'b' Blender is able to extract the channels but the outcome is still broken/messed up somehow.
There seems to be a problem with the connection between channels and image information."

A colleague of mine, when further investigating the issue, wrote: "Vray/Cinema 4D writes the full R G B channel name which means "AO.red, AO.green, AO.blue" but Blender seems to need "AO.r, AO.g, AO.b" instead." And further notes: "If I manually change channels in the EXR-Header that the colors end with 'r' 'g' and 'b' Blender is able to extract the channels but the outcome is still broken/messed up somehow. There seems to be a problem with the connection between channels and image information."

blender-admin commented

2018-02-23 14:32:17 +01:00

This issue was referenced by dceb8d37c2

This issue was referenced by dceb8d37c2c7acfe42a95e7947cb7324c1b1e9a1

Brecht Van Lommel commented

2018-02-23 14:34:45 +01:00

Added subscriber: @brecht

Brecht Van Lommel commented

2018-02-23 14:34:45 +01:00

The channel names used here don't follow the OpenEXR recommendations, but we can support them anyway.
http://www.openexr.com/TechnicalIntroduction.pdf

The channel names used here don't follow the OpenEXR recommendations, but we can support them anyway. http://www.openexr.com/TechnicalIntroduction.pdf

Brecht Van Lommel commented

2018-02-23 14:52:54 +01:00

Changed status from 'Open' to: 'Resolved'

Brecht Van Lommel closed this issue

2018-02-23 14:52:54 +01:00

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Compositor not reading layers/passes from Multilayer OpenEXR Files created inr 3D packages #54137