A fairly simple tutorial this one and thoroughly intriguing into how particles work within Maya. I quite liked testing out the making of a cloud. The only criticism to my video is that for some reason the Blue background did not render out. And on inserting one in after effects I was made aware of a rather angelic halo around the cloud. Its probably a case of re-rendering, but for the sake of viewing particle effects as an object moves against them I think it is fairly successful.
Here is a rendition of Fog using grid particles. Once you get past the temperamental magnetic tool when creating the grid of particles, its plain sailing. I am amazed at how quick and simple it is to create a foggy outlook and the result is quite atmospheric.