If you're shooting a single fragment (scan) - you get a three-dimensional model of the object surface. To create a full object model you need to obtain surfaces of the object, that together entirety replicate the form of the object, i.e. scan the object from different angles.
Obtained fragments are combined in the special software by the surface geometry, hence there is another requirement - the object must be rigid and do not change its shape during the entire scanning procedure. Otherwise, the geometry of the same area of the object surface may be different, and it will be impossible to unite the pieces into a coherent whole.
In 3D scanner there are 3 scan options available, which are different, in the first place, by the fragment alignment method:
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