Control blender from python script outside of blender

Question

i have a GUI made in pyside that render a blender file. This GUI have a resolution options to control this before render scene.... i have this code in PyCharm, i need to run this code without open blender.

    if resolutionWidth != 0:                 
        bpy.context.scene.render.resolution_x = resolutionWidth

    if resolutionHeight != 0:
        bpy.context.scene.render.resolution_y = resolutionHeight

    # Override Resolution Scale
    #SCALE = batchRender_UI.resolution_scaleUI()
    if SCALE != 0:                      
        bpy.context.scene.render.resolution_percentage = SCALE

YadneshD · Accepted Answer · 2022-03-13 09:42:16Z

5

You can run a blender's python script without opening blender's GUI in background from command line. Go to directory where blender is installed, open terminal/cmd over there and type following command -

blender -b -P path/to/your/script.py

The flag -b tells blender to run in background. -P tells to run a python script using blender's python. If you want to open blender's GUI and run py script then run the following code:

blender -P path/to/your/script.py

While running as subprocess use the following code:

import subprocess
subprocess.run(['blender', '-b', '-P', 'path/to/your/script.py'])

answered Mar 13, 2022 at 9:42

YadneshD

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2 Comments

Amine Sehaba Over a year ago

This worked perfectly for me: blender -P path/to/your/script.py. How can I add arguments to my python script?

YadneshD Over a year ago

Try blender -P path/to/your/script.py -- arg0 arg1 arg2

Claude · Accepted Answer · 2022-08-27 09:52:25Z

0

In case you want more interactive control over Blender, you can build Blender as a python module.

This is a build option to be able to import blender into python and access its modules. [...] This is mainly limited to features which can be usable in background mode, so you cant for instance do OpenGL preview renders.

Be aware that since Blender uses a copyleft license, depending on how you want to use and distribute your app, this may or may not be acceptable.

answered Aug 27, 2022 at 9:52

Claude

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