I've watched David Ariew's volumetric tutorial and have set up a little scene with a camera inside a box with a window, an area light outside for light coming through the window, another area light for a bit of fill inside the room, and an Octane daylight object to provide the scattering medium.
It works, but there is so much noise, this render is 5000 samples with Direct Lighting.
Is there a trick to clean this up or do I just have to have a ridiculous amount of samples?