The flattening of rhinoceros refers to making the surface of three-dimensional model smoother. But they are implemented in different ways.

1, rhinoceros flattening usually refers to making the surface smoother by increasing mesh density and smoothness. This can be achieved by using softening or smoothing commands in computer graphics software (such as Rhino). This method will produce many small bumps and depressions on the surface, making the surface look smoother.

2. Flattening refers to moving some parts of the surface according to certain rules or distances to make it flatter. For example, during casting or forging, flattening can be achieved by using heated metal plates, pressure, rollers or other tools. In 3D modeling, flattening can be accomplished by selecting a specific face or edge and moving it inward or outward.