Re: FG Saving. How often?
FG is view dependant, however has the ability to interpolate between frames.
In other words it is possible (and recommended) to calculate FG for every nth frame of an animation. The frames that were not calculated are interpolated or avaeraged from the frames that were calculated.
Things to consider.
Length of the animation
motion of the camera path
geometry complexity
moving geometry
Used in combination with photons it is possible to use very few samples and frames.
jhv
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