There are many different ways for creating a
realistic effect. One can find more than one path
heading up to the mountain, but there is only one peak
I prefer using faster technologies, so whenever it is
possible I seek 2D solutions.
Most of the time the outcome is more than convincing.
Shot images always have an inherent natural
appearence. Almost anything can be created from photos
or film sequences with a bit of tracking and some
light 3D work.
In 3D applications one faces similar problems as when
shooting on location. Positioning of a light or
defining its character is not really an issue to be
solved by software routine.
The real creative challenge is to create a lighting
structure which could be finalized in the faster,
interactive stage of compositing with the co-operation
of the DoP and the director.