Blackness tiles aren't being drawn at all on beta. Code confirmed working in stable, doesn't work in beta.
Bug report and diagnosis happened in discord. Hard link to conversation follows:
https://discord.com/channels/725444629172060262/ 725458744711839873/808565849984073758
atom
plane = -1
mob
sight = SEE_BLACKNESS
Login()
client.screen += new/obj/master_plane()
..()
obj/master_plane
plane = 0
screen_loc = "1,1"
appearance_flags = PLANE_MASTER
blackness
plane = 0
color = list(1,0,0,0, 0,1,0,0, 0,0,1,0, 0,0,0,1, 1,1,1,0)
The above should be changing the color of the blackness plane full white for easy sight on the problem. Nothing shows up in beta. Only in stable.