I started to experiment with creating volumetric lighting in Maya but I found it difficult to get the look I wanted. At first I was using a spotlight and creating a light fog node but when I tried to shine it through a window shape the spotlight would shine through the geometry of the wall. I realise now that this was probably due to the samples being too low.
I was also finding it hard to make the light rays appear through the window.
Alec reminded me of this tutorial so I went back and tried it out as an alternative to using the spotlight fog node:
Maya: Creating Volumetric Lights in Mental Ray (Long Version)
This method uses volume primitives to add a container of fog within the scene. I liked that this method affects area lights as well as spot lights and I also liked how soft it can be. However, the fog rays were invisible from the angle I wanted to render at so I stopped experimenting at this point so as to work on other parts of the short.