[SoUlFaThEr]

i can only comment on the entities thing

the func_illusionaries were a problem with waypointing.....i had suggested that func_illusionaries be
KNOWN as solid......so that the auto pathwaypoint connections would not automatically connect THROUGH a func_illusionary, thus making less poaths to erase because func_illusionaries often have "clip brushes" on them to block player/bot movement.

this was also an issue with bots not shooting through railings(which are illusionaries if the mapper knows what hes doing). staircase railings that dont break but block player movement and are see through.

the idea about lighting is interesting......i dont know if that can be implemented......but a NEW feature like this would not be backwards compatible with an older bot......(i think) because pod2.5 for example, or other compatibles, would not know what to do with a "darkness flag".