Particles Do Not Obey Lighting Channels

Particle systems ignore lighting channels - no matter what channel a light is on (even if no channels are selected), it will affect lit particles. Changing lighting channels on the particle itself has no effect; it will always be lit by all lights regardless of channels.

This issue is present in 4.18.3, 4.19.1, and Main. Possibly related to [Link Removed].

1. In new empty level, add red Point light (stationary), set to Channel 0
2. Add blue Point light (stationary), set to Channel 1
3. Create new particle system with a white lit material so you can see lights affecting it
4. Add particle system to scene, positioned so it is affected by red and blue lights

Result: Particle is lit by both sets of lights even though it is only set to Channel 0