Is smooth shading more expensive than flat shading?

Development Rendering
1

Hello,

is smooth shading more expensive than flat shading and if it is, how much more?

Thank you,

Thilo

2

I’m not a graphics engineer but if anything I would expect the opposite, since flat shading requires duplicating vertices to split the normals apart I assume it would be more expensive.

3

You shouldnt worry about something small as that unless your developing for the n64.