Some of the advice about lighting, clear lines, surface patterns, and so are based on institutions.

一些关于照明、清晰的线条、表面图案等方面的建议是基于机构而给出的。

Depending on its surface pattern, it might turn in a single direction to create a drop or ring, or rotate more freely to form a sphere.

依据其表面图案不同，珍珠可能会朝一个方向转动变成水滴状或环形，抑或更自由地自转形成球状。