Shade Smooth & Flat

The appearance of the mesh edges are determined to be evened out or well defined within the 3D Viewport and render. In Edit Mode, individual faces can be selected to determine which faces are smoothed or flattened.

Muista

Both Shade Smooth and Flat are also available in Object Mode and function the same way.

Shade Smooth

Reference

Mode

Edit Mode

Menu

Face ‣ Shade Smooth

Using interpolated vertex normals, the mesh faces will blur at the edges and appear smooth.

Shade Flat

Reference

Mode

Edit Mode

Menu

Face ‣ Shade Flat

Face normals are displayed evenly, because of this all the edges of the selected mesh will be easily visible.

Vihje

Use the Edge Split modifier and Auto Smooth within the mesh data properties to balance between smooth surfaces and sharp edges.