MoonRay, Blender and Hydra

[fantomid]

Christopher wrote a plugin to use MoonRay in Blender: https://github.com/cjhosken/mfb
Talks on the Blender's devtalk are here: https://devtalk.blender.org/t/moonray-plugin-for-blender/35272/48

Export to rdla is possible but rendering with hydra doesn't work.
I managed to build MoonRay with the libraries used by Blender 4.2 to have the same USD version.
Works are currently in branch, to be completed https://github.com/fantomid/dwa-openmoonray/tree/debian-develop

hd_render works but the rendering in Blender don't.
I got logs from Blender attached to the discussion: blender_logs.log

export TF_DEBUG=“HD*” was run before running Blender with the following command line: --log “hydra.render” --log-level 5
Searching the logs, at the end, you could find Could not open file '/tmp.rdla' for writing with an RDL2 ASCII writer.

Could it explain the Blender crash ?
Is there a context variable to set to write the temporary file to a directory with correct permissions.
In general, is it possible to have more logs with MoonRay and Hydra when debugging a release version ?

Regards,
Guillaume

[fantomid]

Exporting HDMOONRAY_RDLA_OUTPUT to a directory with write's permission solves the problem.

[jmahovsky-dwa]

We're somewhat puzzled by this problem. The HDMOONRAY_RDLA_OUTPUT default is an empty string, so it shouldn't be getting set to /tmp.rdla. Was it being set somewhere in your environment?