Fix X-Ray on death for simple_mobs, fix view variables damage for non-humans

code/modules/mob/living/carbon/alien/alien.dm

@@ -277,6 +277,7 @@ Des: Removes all infected images from the alien.
 		grant_death_vision()
 		return
 
+	see_invisible = initial(see_invisible)
 	sight = SEE_MOBS
 	if(nightvision)
 		see_in_dark = 8

code/modules/mob/living/carbon/carbon.dm

@@ -1139,6 +1139,8 @@ so that different stomachs can handle things in different ways VB*/
 		grant_death_vision()
 		return
 
+	see_invisible = initial(see_invisible)
+	see_in_dark = initial(see_in_dark)
 	sight = initial(sight)
 	lighting_alpha = initial(lighting_alpha)
 	

code/modules/mob/living/living.dm

@@ -1039,13 +1039,3 @@
 			update_transform()
 		if("lighting_alpha")
 			sync_lighting_plane_alpha()
-
-/mob/living/update_sight()
-	if(!client)
-		return
-
-	if(stat == DEAD)
-		grant_death_vision()
-		return
-
-	. = ..()

code/modules/mob/living/silicon/ai/ai.dm

@@ -1303,8 +1303,8 @@ var/list/ai_verbs_default = list(
 
 	see_invisible = initial(see_invisible)
 	see_in_dark = initial(see_in_dark)
-	lighting_alpha = initial(lighting_alpha)
 	sight = initial(sight)
+	lighting_alpha = initial(lighting_alpha)
 
 	if(aiRestorePowerRoutine)
 		sight = sight &~ SEE_TURFS

code/modules/mob/living/simple_animal/simple_animal.dm

@@ -609,4 +609,33 @@
 	..()
 	if(AIStatus == AI_Z_OFF)
 		SSidlenpcpool.idle_mobs_by_zlevel[old_z] -= src
-		toggle_ai(initial(AIStatus)) 
+		toggle_ai(initial(AIStatus)) 
+
+// Simple animals will not be given night vision upon death, as that would result in issues when they are revived.
+/mob/living/simple_animal/grant_death_vision()
+	sight |= SEE_TURFS
+	sight |= SEE_MOBS
+	sight |= SEE_OBJS
+	see_in_dark = 8
+	see_invisible = SEE_INVISIBLE_OBSERVER
+	sync_lighting_plane_alpha()
+
+/mob/living/simple_animal/update_sight()
+	if(!client)
+		return
+
+	if(stat == DEAD)
+		grant_death_vision()
+		return
+
+	see_invisible = initial(see_invisible)
+	see_in_dark = initial(see_in_dark)
+	sight = initial(sight)
+
+	if(client.eye != src)
+		var/atom/A = client.eye
+		if(A.update_remote_sight(src)) //returns 1 if we override all other sight updates.
+			return
+
+	SEND_SIGNAL(src, COMSIG_MOB_UPDATE_SIGHT)
+	sync_lighting_plane_alpha()