We just wrapped up production on a project which required us to create all the major cloud types inside of Unity. It was a challenging task with limited budget required as they have to perform well in real time. Our initial approach of using mesh and particles around the edges to soften didn't work so well. We then moved on to a pure particle approach. While it looked fine, it had proven to be too costly in the engine. After some more experimentation, we were able to come up

Library tower design concept. Full resolution image here.

One of the super fun props we worked on for the ChronoBlade project. Process- Built high resolution model > Extract Maps > Build / UV low resolution model for game. Also set up the SDK for the animating panels. Boom Disc in action