--cycles-device command line option does nothing #104634

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Luke Whitehorn · 2023-11-16T14:49:13+01:00

Luke Whitehorn commented

2023-11-16 14:49:13 +01:00

Page Information
File: N/A
Blender Version: 4.0

Short description of error
The --cycles-device command line option does nothing.

When attempting to setup Blender on the render farm, I pass the command line option as follows:

blender .\scene.blend -o out.exr --background -E CYCLES -f 1 -- --cycles-device OPTIX --cycles-print-stats

The scene renders using the CPU only and no GPU.
I am guessing that the --cycles-device option is supposed to act the same as going to Preferences > System > cycles Render Devices and selecting OptiX? If not, what is this option for?

I am aware that if I do set the preferences manually on a machine, then that particular machine will rendering using the GPUs, however because I am looking to integrate this into our farm, (and everything on our farm is run via Rez), I do not want to have to manually go to every machine, open up Blender and set this via the UI.

**Page Information** File: `N/A` Blender Version: `4.0` **Short description of error** The `--cycles-device` command line option does nothing. When attempting to setup Blender on the render farm, I pass the command line option as follows: `blender .\scene.blend -o out.exr --background -E CYCLES -f 1 -- --cycles-device OPTIX --cycles-print-stats` The scene renders using the CPU only and no GPU. I am guessing that the `--cycles-device` option is supposed to act the same as going to Preferences > System > cycles Render Devices and selecting `OptiX`? If not, what is this option for? I am aware that if I do set the preferences manually on a machine, then that _particular_ machine will rendering using the GPUs, however because I am looking to integrate this into our farm, (and everything on our farm is run via Rez), I do not want to have to manually go to every machine, open up Blender and set this via the UI.

Luke Whitehorn added the

labels 2023-11-16 14:49:14 +01:00

Matthew Hinson commented

2024-04-04 19:29:02 +02:00

If the option indeed does nothing, it would be better to report that in the Blender project instead. We won't be able to help you much here in the manual project, I'm afraid - the documentation comes straight from blender -h, so in that regard, there's nothing wrong with it.

If the option indeed does nothing, it would be better to report that in the [Blender project](https://projects.blender.org/blender/blender/issues) instead. We won't be able to help you much here in the manual project, I'm afraid - the documentation comes straight from `blender -h`, so in that regard, there's nothing wrong with it.

Matthew Hinson closed this issue

2024-04-04 19:29:03 +02:00

Blender Bot added

and removed

labels 2024-04-04 19:29:05 +02:00

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