I think, they have it in mind whyte the biomes and weather packages ... they have to create an entirely new way of handling those many and different plants in certain weather conditions, so the third-party forces would be added on top of that ? ... so why stop on helis and cars ? .. it could lay down even by walking of persons and animals (would be interesting to hunt then, just whyte some intensity level according to the size of the animal), from jets at landing (propeller-planes too) and rockets at fire ... actually, if the force app gets done, why not getting "mass" to everything, that would not only set the proper terrain deformation (that is planned - terrain condition dependent), but interact whyte the flora also (whyte so much intensity-diversity, the reality of that outcome would be neat). Not sure if it will drain the CPU doe.
... the Far Cry/Crysis simplified way is there too, but im not sure if it would be as realistic (would need a lot of tweaking for each plant, where for this reality based math approach, it just would work everywhere and in real-time force intensity) and how it would act in OTs procedural approach.
... and whyle were there - Fires ! Based on recent and actual weather conditions and plant types, not limited to few meters, so catastrophes can happen :
... thats what it needs.
