This is a workflow I developed while working on several projects that needed lots of .... well.. dead :)
At its heart it's based on Photoscan generated geometry and textures and then later distributed in all sorts of ways.
I wanted to use flat ambient light you get for free while shooting in diffuse light environment such as on a cloudy day.
Since all additional light we can think of as additive you can get a lot of flexibility out of this. You can render out your light (only) pass with shadow mask and put your dead in almost any lighting situation, pretty neat.
If there is interest and I manage to get some time I might go in to more detail on the process.
This is tutorial for Eyeon Fusion. Its based on Fusions 3D particle system and how its used to create interesting looking forest system for set extensions or background fillers. All in all as a concept it can work on most particle systems regardless of the main application.