8. Normal maps

A normal map is built on top of the vertex normals.

Use the normal map Normal map strength Read green (Y) reversed

Base vertex normals Smooth (vertex normals) Flat (face normals)

Light direction (left/right) Light height Toon shading Toon threshold Show vertex normals

Triangles: · Drag the view to turn it.

A normal map tilts the normal a little, on top of the vertex normals (and the UV directions).
Turn on “Read green (Y) reversed” and the bumps flip up and down, so the lighting looks wrong.
Set the base to “Flat” and the faces show even with the same normal map. When the base normals change, the result changes.