Normal per vertex or normal per face ??

[arieb]

Hello All ,

Shell I use normal per vertex or normal per face ?
Is it look better if I use normal per vertex ?
Is performance are better when I use normal per face ?

[Teofuzz]

Performance is not affected by normals because even if you specify a normal for all vertices, every vertex has a normal used in lighting calculations.
You should use a normal 'per vertex' (the average of the near faces normals) when you want your object to look smooth: example, when you have a sphere and even with a few faces you want it to seem round.
You have to use a normal for all the vertices of a face when the object is really faceted, like a cube.
Hope this helps...
tFz

[This message has been edited by Teofuzz (edited 05-23-2001).]