Fixes planet lights (hopefully not too hard)

code/modules/lighting/lighting_turf.dm

@@ -6,6 +6,7 @@
 
 	var/tmp/lighting_corners_initialised = FALSE
 
+	var/tmp/outdoors_adjacent = FALSE
 	///Our lighting object.
 	var/tmp/datum/lighting_object/lighting_object
 	///Lighting Corner datums.
@@ -96,9 +97,9 @@
 ///Setter for the byond luminosity var
 /turf/proc/set_luminosity(new_luminosity, force)
 	// SSplanets handles outdoor turfs
-	if(is_outdoors() && !force)
+	if((is_outdoors() && !force) || outdoors_adjacent)
 		return
-	
+
 	luminosity = new_luminosity
 
 ///Calculate on which directions this turfs block view.

code/modules/planet/sun.dm

@@ -13,7 +13,7 @@
 	// Doesn't save much work, but might save a smidge of client work
 	if(our_color == new_color)
 		return
-	
+
 	// Visible change
 	our_color = new_color
 	sun.set_color(new_color)
@@ -22,19 +22,19 @@
 	// Doesn't save much work, but might save a smidge of client work
 	if(our_brightness == new_brightness)
 		return
-	
+
 	// Store the old for math
 	. = our_brightness
 	our_brightness = new_brightness
-	
+
 	// Visible change
 	sun.set_alpha(round(CLAMP01(our_brightness)*255,1))
-	
+
 	// Update dynamic lumcount so darksight and stuff works
 	var/difference = . - our_brightness
 	for(var/turf/T as anything in turfs)
 		T.dynamic_lumcount -= difference
-	
+
 /datum/sun_holder/proc/apply_to_turf(turf/T)
 	if(sun in T.vis_contents)
 		warning("Was asked to add fake sun to [T.x], [T.y], [T.z] despite already having us in it's vis contents")
@@ -49,21 +49,21 @@
 
 /datum/sun_holder/proc/rainbow()
 	var/end = world.time + 30 SECONDS
-	
+
 	var/col_index = 1
-	
+
 	var/list/colors = list("#ff5d5d","#ffd17b","#ffff5e","#7eff7e","#6868ff","#b753ff","#d08fff","#ffffff")
 	var/original_brightness = sun.alpha/255
 	var/original_color = sun.color
-	
+
 	update_brightness(0.8)
-	
+
 	while(world.time < end)
 		update_color(colors[col_index])
 		if(++col_index > colors.len)
 			col_index = 1
 		sleep(3)
-	
+
 	update_brightness(original_brightness)
 	update_color(original_color)
 
@@ -75,7 +75,7 @@
 	mouse_opacity = 0
 	alpha = 0
 	color = "#FFFFFF"
-	
+
 	var/turfs_providing_spreads = list()
 	var/spreads = list()
 
@@ -112,7 +112,7 @@
 	T.vis_contents += src
 	T.dynamic_lumcount += 0.5
 	T.set_luminosity(1, TRUE)
-	
+
 	var/list/localspreads
 	// Test for corners
 	for(var/direction in cornerdirs)
@@ -120,7 +120,7 @@
 		if(dirturf && !dirturf.is_outdoors())
 			var/turf/TL = get_step(T, turn(direction, -45))
 			var/turf/TR = get_step(T, turn(direction, 45))
-			
+
 			// If outdoors at 45 degrees are the same, then this is a corner
 			if(TL && TR && TL.is_outdoors() == TR.is_outdoors())
 				var/atom/movable/sun_visuals_overlap/OL
@@ -132,10 +132,11 @@
 					OL = spreads["i[direction]"]
 				dirturf.vis_contents += OL
 				dirturf.set_luminosity(1)
+				dirturf.outdoors_adjacent = TRUE
 				LAZYINITLIST(localspreads)
 				LAZYINITLIST(localspreads[dirturf])
 				LAZYADD(localspreads[dirturf], OL)
-	
+
 	// Take all orthagonals
 	for(var/direction in cardinal)
 		var/turf/dirturf = get_step(T, direction)
@@ -148,6 +149,7 @@
 			var/atom/movable/sun_visuals_overlap/OL = spreads["[direction]"]
 			dirturf.vis_contents += OL
 			dirturf.set_luminosity(1)
+			dirturf.outdoors_adjacent = TRUE
 			LAZYINITLIST(localspreads)
 			LAZYINITLIST(localspreads[dirturf])
 			LAZYADD(localspreads[dirturf], OL)
@@ -163,6 +165,14 @@
 	if(LAZYLEN(applied))
 		for(var/turf/old as anything in applied)
 			old.vis_contents -= applied[old]
+			var/old_lit = FALSE
+			for(var/direction in alldirs)
+				var/turf/CT = get_step(old, direction)
+				if(CT && CT.is_outdoors())
+					old_lit = TRUE
+				if(!old_lit)
+					old.outdoors_adjacent = TRUE
+					old.set_luminosity(0)
 			applied -= old
 		turfs_providing_spreads -= T
 		applied.Cut()