From 8bc56189dcbba2b87d7477ef6e92cb29d470c70b Mon Sep 17 00:00:00 2001
From: SkyratBot <59378654+SkyratBot@users.noreply.github.com>
Date: Fri, 24 Feb 2023 10:20:15 +0100
Subject: [PATCH] [MIRROR] Fixes lava not drawing light up on multiz [MDB
 IGNORE] (#19511)

* Fixes lava not drawing light up on multiz (#73591)

## About The Pull Request

Whooooooops

This isn't the best way to do this, but it'd require messing with
openspace code, and I don't want to make this overcomplex, so we'll just
spend extra on multiz then.

* Fixes lava not drawing light up on multiz

---------

Co-authored-by: LemonInTheDark <58055496+LemonInTheDark@users.noreply.github.com>
---
 code/game/turfs/open/lava.dm | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/code/game/turfs/open/lava.dm b/code/game/turfs/open/lava.dm
index 4bc2c47fb7f..55863fc9f7e 100644
--- a/code/game/turfs/open/lava.dm
+++ b/code/game/turfs/open/lava.dm
@@ -65,7 +65,16 @@
 /// Refreshes this lava turf's lighting
 /turf/open/lava/proc/refresh_light()
 	var/border_turf = FALSE
-	for(var/turf/around as anything in RANGE_TURFS(1, src))
+	var/list/turfs_to_check = RANGE_TURFS(1, src)
+	if(GET_LOWEST_STACK_OFFSET(z))
+		var/turf/above = SSmapping.get_turf_above(src)
+		if(above)
+			turfs_to_check += RANGE_TURFS(1, above)
+		var/turf/below = SSmapping.get_turf_below(src)
+		if(below)
+			turfs_to_check += RANGE_TURFS(1, below)
+
+	for(var/turf/around as anything in turfs_to_check)
 		if(islava(around))
 			continue
 		border_turf = TRUE
@@ -81,7 +90,15 @@
 
 	if(result && !islava(result))
 		// We have gone from a lava turf to a non lava turf, time to let them know
-		for(var/turf/open/lava/inform in RANGE_TURFS(1, result))
+		var/list/turfs_to_check = RANGE_TURFS(1, result)
+		if(GET_LOWEST_STACK_OFFSET(z))
+			var/turf/above = SSmapping.get_turf_above(result)
+			if(above)
+				turfs_to_check += RANGE_TURFS(1, above)
+			var/turf/below = SSmapping.get_turf_below(result)
+			if(below)
+				turfs_to_check += RANGE_TURFS(1, below)
+		for(var/turf/open/lava/inform in turfs_to_check)
 			inform.set_light(l_on = TRUE)
 
 	return result