How do you render a scene with a given resolution that differs from the original resolution in the scene XML file?

[ciy405x]

How do you render a scene with a given resolution that differs from the original resolution in the scene XML file?

I want to render several scenes with the resolution half of the original resolution in their XML file.
For instance, there are a.xml, b.xml, and c.xml files, and they have their distinct sensor descriptions in the XML file.
I want to do something like the below:

for file in files:
    scene = mi.load_file(file)
    sensor = scene.sensors()[0]
    w, h = get_the_original_resolution_of_scene(sensor, ...)
    w /= 2
    h /= 2
    new_sensor = make_new_sensor_with_half_resolution(w, h, sensor, ...)
    output = mi.render(scene, sensor=new_sensor)

[njroussel]

Hi @ciy405x

The Film exposes a size parameter through mi.traverse(). Take a look at the hdrfilm documentation for example. You should be able to modify this directly, without having to create a new sensor.

[ciy405x]

Thx for your hint!

sensor_params = mi.traverse(scene.sensors()[0])
sensor_params["film.size"] //= 2
sensor_params.update()