DirectionalLight3D

DirectionalLight3D - A Light3D that shines from far away with no falloff, like sunlight

• It shines from its position toward the origin, like a three.js DirectionalLight: only the direction to it counts, so moving it or its parent swings the light around; parent it to a sun in the sky and it follows
• It cannot sit on the origin, since that leaves no direction
• It casts no shadow: the sun, render3D.sunDirection, does, or a spotlight set as render3D.shadowLight

const fill = new DirectionalLight3D(vec3(-1, 1, 1), hsl(.6, .5, .3)); // from the back left and above