8 hours, death particles.
Created the death particles for fliers and lurks. They dissolve on impact with the ground much like how a walker appears to. On impact they smear upward and in the direction of their velocity on hit. The lurk has an emitter set attached to their wings that let out a stream of particles for a short duration following the same smearing behavior.
Roughed out the turret death effect, still more work to do. The turret has a dead unit version of itself used to play out the death animation without attracting walkers. We'll talk about it when it's done.
Misc fixes.