you need to calculate the face normals around E and normalize the averange normal of all surounding face normals of E.
Terrain Normals
Blitz3D Forums/Blitz3D Programming/Terrain NormalsThe forum is locked. These are the original blitzbasic.com forums, kept so they can still be read. No new topics, replies or edits can be made here. To join in, head over to the Blitz3D+ forums.