Arnold Multi Channel EXR

[Anonymous]

If I'm just missing something simple, please forgive me - however I cannot seem to get a multi-channel EXR with all of my AOVs to work from the Arnold Renderer. 

I have enabled the "Merge AOVs" checkbox in the attribute editor when choosing the default driver, but no matter what options I try with my file naming scheme, I keep getting multiple EXRs or deepexrs, with each one per AOV. 

Any help is appreciated!

[Stephen.Blair]

Do you have something like <RenderPass> in your Image file prefix? That will prevent merged EXRs.

If all else fails, please get an Arnold log for a render so I can check it.

Thanks

Stephen
Solid Angle Support

[Anonymous]

If I don't set anything in the File Name prefix box, I will then get a folder for each AOV with the individual EXRs in them. If I do have the <RenderPass> token, then I get the individual EXRs, just outside of a folder. 

Attached is a render log from a test scene. 

[Stephen.Blair · Accepted solution]

Hi

Are you sure you enabled Merge AOVs on the defaultArnoldDriver, and not on defaultArnoldDisplayDriver  ?

The log looks like Merge AOVs isn't enabled for defaultArnoldDriver.

If you're still having problems, you can delete all the geo and lights and send me the scene to look at.

Thanks

Stephen

Solid Angle Support

[Stephen.Blair]

Hi

Is Merge AOVs enabled on defaultArnoldDriver?

Are you using the same driver for all the AOVs (on the AOVs tab, the driver should be "<exr>", that's the default exr driver).

Thanks

Stephen

Solid Angle Support

[Anonymous]

Ok so the issue was in fact not having the defaultArnolddriver set with the Merge AOVs checkbox. I think it was a bit confusing because the first option that comes up in the attribute editor was the display driver, and that was where I had the Merge AOVs set. It actually took a bit of digging for me to even find the place to make that change for the defaultArnolddriver, as it doesn't seem to be that clear to me from any of the tutorials or manuals that I saw. 

Thanks!

[Stephen.Blair]

Hi

Yes, depending on how you load the nodes in the Attribute Editor, often thedefaultArnoldDisplayDriver is first.

Myself, I usually type "defaultArnoldDriver" in the search box, but I'm a techie tech support guy not an artist 😉

Usually, if you use Select Driver in the AOV list, you'll get the right driver node:

Thanks

Stephen
Solid Angle Support

[Anonymous]

Thank you! Saved my day 🙂

[elenamash22]

That makes sense; the problem was that the Merge AOVs checkbox was not enabled on the default Arnold driver. I think it was a bit perplexing because the first option that shows up Loklok in the attribute editor was the display driver, and that was where I had the Merge AOVs set. Finding the location to modify the default Arnold driver actually required some research on my part because none of the tutorials or guides I came across seemed to make it very obvious.