Unity learns from spaceshooter to record the difference between fixedupdate and update in unity for the second time

View of

​​Mesh Collider  Mesh collider ​​

​​Camera Of Projection​​

Perspective

Perspective camera
perspective . The camera will render the game object in perspective . Apply to 3D

Orthographic

** : Orthographic camera
orthogonal . The camera will render the game object without perspective . Apply to 2D

​​Unity Camera Of Clear Flags​​

​​Unity in FixedUpdate and Update The difference between ​​