I don't understand why when rendering a flythrough animation in 3dsmax; Octane still performs processing geometrie for every frame wasting a tremendous amount of time!

When you open the octane viewport in max, their is no recalculation of the geometrie when so why when rendering a fly through?
Am I right or did I miss something in the rendering process?
If I'm right, could the team please fix that and put an "octane fly through option button" in max rendering settings?!
That would help tremendously.
Julien