diff --git a/code/modules/mob/dead/observer/observer.dm b/code/modules/mob/dead/observer/observer.dm
index 17cb8fd0f2..7043c9de6a 100644
--- a/code/modules/mob/dead/observer/observer.dm
+++ b/code/modules/mob/dead/observer/observer.dm
@@ -32,7 +32,7 @@ var/global/list/image/ghost_sightless_images = list() //this is a list of images
 	var/anonsay = 0
 	var/image/ghostimage = null //this mobs ghost image, for deleting and stuff
 	var/ghostvision = 1 //is the ghost able to see things humans can't?
-	var/seedarkness = 1
+//	var/seedarkness = 1
 	incorporeal_move = 1
 
 	var/is_manifest = 0 //If set to 1, the ghost is able to whisper. Usually only set if a cultist drags them through the veil.
diff --git a/code/modules/mob/living/carbon/human/life.dm b/code/modules/mob/living/carbon/human/life.dm
index 9918a7e4bd..23dfdb2db3 100644
--- a/code/modules/mob/living/carbon/human/life.dm
+++ b/code/modules/mob/living/carbon/human/life.dm
@@ -1128,10 +1128,16 @@
 				see_invisible = SEE_INVISIBLE_LIVING
 				seer = 0
 
+		if(!seedarkness)
+			sight = species.get_vision_flags(src)
+			see_in_dark = 8
+			see_invisible = SEE_INVISIBLE_NOLIGHTING
+
 		else
 			sight = species.get_vision_flags(src)
 			see_in_dark = species.darksight
 			see_invisible = see_in_dark>2 ? SEE_INVISIBLE_LEVEL_ONE : SEE_INVISIBLE_LIVING
+
 		var/tmp/glasses_processed = 0
 		var/obj/item/weapon/rig/rig = back
 		if(istype(rig) && rig.visor)
@@ -1150,7 +1156,7 @@
 
 		if(!glasses_processed && (species.get_vision_flags(src) > 0))
 			sight |= species.get_vision_flags(src)
-		if(!seer && !glasses_processed)
+		if(!seer && !glasses_processed && seedarkness)
 			see_invisible = SEE_INVISIBLE_LIVING
 
 		if(healths)
diff --git a/code/modules/mob/living/life.dm b/code/modules/mob/living/life.dm
index 2209c63008..330adf8ddc 100644
--- a/code/modules/mob/living/life.dm
+++ b/code/modules/mob/living/life.dm
@@ -179,6 +179,10 @@
 	return
 
 /mob/living/proc/update_sight()
+	if(!seedarkness)
+		see_invisible = SEE_INVISIBLE_NOLIGHTING
+	else
+		see_invisible = initial(see_invisible)
 	return
 
 /mob/living/proc/handle_hud_icons()
diff --git a/code/modules/mob/living/silicon/robot/life.dm b/code/modules/mob/living/silicon/robot/life.dm
index 8d89201007..db8d7b2ead 100644
--- a/code/modules/mob/living/silicon/robot/life.dm
+++ b/code/modules/mob/living/silicon/robot/life.dm
@@ -172,6 +172,12 @@
 		src.sight |= SEE_MOBS
 		src.see_in_dark = 8
 		src.see_invisible = SEE_INVISIBLE_LEVEL_TWO
+	else if (!seedarkness)
+		src.sight &= ~SEE_MOBS
+		src.sight &= ~SEE_TURFS
+		src.sight &= ~SEE_OBJS
+		src.see_in_dark = 8
+		src.see_invisible = SEE_INVISIBLE_NOLIGHTING
 	else if (src.stat != 2)
 		src.sight &= ~SEE_MOBS
 		src.sight &= ~SEE_TURFS
diff --git a/code/modules/mob/mob_defines.dm b/code/modules/mob/mob_defines.dm
index ca4a54b0e0..427786ad41 100644
--- a/code/modules/mob/mob_defines.dm
+++ b/code/modules/mob/mob_defines.dm
@@ -210,3 +210,5 @@
 	var/list/active_genes=list()
 	var/mob_size = MOB_MEDIUM
 	var/forbid_seeing_deadchat = FALSE // Used for lings to not see deadchat, and to have ghosting behave as if they were not really dead.
+
+	var/seedarkness = 1	//Determines mob's ability to see shadows. 1 = Normal vision, 0 = darkvision
\ No newline at end of file