The AI eye now has a sprite.

Also defines new (see_)invisibility levels for the AI eye, to ensure that cultists visiting the other side cannot suddenly see it while still allowing observers to.
Uses a black and white version of the face hologram as placeholder.

code/modules/mob/dead/observer/observer.dm

@@ -26,7 +26,7 @@
 
 /mob/dead/observer/New(mob/body)
 	sight |= SEE_TURFS | SEE_MOBS | SEE_OBJS | SEE_SELF
-	see_invisible = SEE_INVISIBLE_OBSERVER
+	see_invisible = SEE_INVISIBLE_OBSERVER_AI_EYE
 	see_in_dark = 100
 	verbs += /mob/dead/observer/proc/dead_tele
 
@@ -409,7 +409,7 @@ This is the proc mobs get to turn into a ghost. Forked from ghostize due to comp
 	set category = "Ghost"
 
 	if (see_invisible == SEE_INVISIBLE_OBSERVER_NOLIGHTING)
-		see_invisible = SEE_INVISIBLE_OBSERVER
+		see_invisible = SEE_INVISIBLE_OBSERVER_AI_EYE
 	else
 		see_invisible = SEE_INVISIBLE_OBSERVER_NOLIGHTING
 

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

@@ -1,18 +1,19 @@
 // AI EYE
 //
-// An invisible (no icon) mob that the AI controls to look around the station with.
+// A mob that the AI controls to look around the station with.
 // It streams chunks as it moves around, which will show it what the AI can and cannot see.
 
 /mob/aiEye
 	name = "Inactive AI Eye"
-	icon = 'icons/obj/status_display.dmi' // For AI friend secret shh :o
+	icon = 'icons/mob/AI.dmi'
+	icon_state = "eye"
+	alpha = 127
 	var/list/visibleCameraChunks = list()
 	var/mob/living/silicon/ai/ai = null
 	density = 0
 	status_flags = GODMODE  // You can't damage it.
-	mouse_opacity = 0
 	see_in_dark = 7
-	invisibility = INVISIBILITY_MAXIMUM
+	invisibility = INVISIBILITY_AI_EYE
 
 // Movement code. Returns 0 to stop air movement from moving it.
 /mob/aiEye/Move()