I've been attempting to adjust the opacity of the material.
Here is the command I am using:
//To obtain the current value
api.scene.get({id:'a8c6435c-f4ff-4e06-b41e-dac33474f856', plug:'Material', property:'opacity'});
//To set a new value
api.scene.set({id:'a8c6435c-f4ff-4e06-b41e-dac33474f856', plug:'Material', property:'opacity'}, 0.3)
Unfortunately, it doesn't seem to be working as intended.
This is the tutorial I am referencing.