toonWood

The cel shader behind toonPlanks and toonLog. A self-shading surface shader: the vertex hook reads the scene's sun (direction, colour, intensity) and the world normal, and the fragment steps N·L into bands flat tones with a narrow band_softness step, lifted to shadow_lift in shadow. The colour map holds only flat paint and ink lines; there is no specular and no metalness. roughness is reported to the library only.