Geometry Normals

Geometry Normals recomputes a mesh's normals from its current shape. Deformed geometry needs this: moved vertices still carry the normals they were born with, so a bent or displaced mesh shades as though nothing happened.

Flip turns the mesh inside out, reversing winding and normals together — which is how a shell becomes visible from within: a room, a sky dome, a cutaway.

• After a hand-rolled deform — Any operator that moves vertices without recomputing normals leaves this job for you.
• Interiors — Flip a sphere and you are inside it; the lighting works from within.
• Fix an imported model — Some files arrive with wrong or missing normals.
• Sky domes and backdrops — A flipped, emissive sphere around the scene.
• Debug shading — If a surface shades strangely, recomputing normals is the first thing to try.

• Deform, Noise, Slice, Weld and Subdivide already recompute normals — you need this node mainly after a chain that ends somewhere unexpected.
• Flip reverses winding too, so backface culling behaves correctly; flipping normals alone would not.
• For hard facets rather than smooth shading, Explode with Amount 0 gives per-face normals.
• Weld with Smooth on is the way to make normals flow across a seam.