Hey,
Just a word to say I would personally :
- track the book with Mocha, until a rock solid track is done
- track anything else but the book too (2 planes at least)
- camera solve (still in Mocha so far for me) > export the solve to Fusion
- import it and tune the points cloud in Fusion
- go on with placing the animation
Of course, this means the animation is done in 3d party app like blender and also imported when done in Fusion

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