code/__HELPERS/lighting_helpers.dm

/proc/emissive_appearance	Produces a mutable appearance glued to the EMISSIVE_PLANE dyed to be the EMISSIVE_COLOR. Order of application matters: Default generated blockers are overlays, and will block its own emissive underlays. If you want an object to be both a blocker, and have their own emissive, it has to be an overlay instead. Grayscale lightmasks are visible in the BYOND right-click and Examine pane, unless they're covered up by another overlay.
/proc/emissive_blocker	Produces a mutable appearance glued to the EMISSIVE_PLANE dyed to be the EM_BLOCK_COLOR.

/proc/emissive_appearance

Produces a mutable appearance glued to the EMISSIVE_PLANE dyed to be the EMISSIVE_COLOR. Order of application matters: Default generated blockers are overlays, and will block its own emissive underlays. If you want an object to be both a blocker, and have their own emissive, it has to be an overlay instead. Grayscale lightmasks are visible in the BYOND right-click and Examine pane, unless they're covered up by another overlay.

/proc/emissive_blocker

Produces a mutable appearance glued to the EMISSIVE_PLANE dyed to be the EM_BLOCK_COLOR.