What the Light Affects
Every lamp has a set of switches that control which objects receive its light, and how it interacts with materials.
- The light produced by the lamp is subtracted from the one “available” on the surfaces it hits, which darkens these surfaces instead of brightening them.
- This Layer Only
- Causes the lamp to only light objects on the same layer.
- Prevents the lamp from producing diffuse light (it doesn’t really “light” things).
- Prevents the lamp from producing specular highlights.