particle_lighting

The light a particle takes from the scene it is drawn in, shared by the sprite and mesh particle shaders.

#include "@builtin::deprecated.deprecatedParticles.particle_lighting"

Function	Answers
zero_particle_point_light(input)	The multiplier the point lights near this fragment add — 1 outside every light's radius.
zero_particle_scene_light(input)	The scene's own light at this fragment — the ambient term plus the sun through a wrapped diffuse.
zero_particle_lit(input, rgb, light_influence, light_emission)	rgb with an emitter's two light declarations honoured. Both at 0 returns rgb unchanged.

light_influence is how much of the scene's light the particle takes; light_emission is how much of itself it emits regardless. A ParticleEmitter carries them as lightInfluence and lightEmission, and the particle materials this package ships read them from material properties of the same names.