Low alpha now makes HUDs and tooltips not show up on you

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

@@ -48,8 +48,9 @@
 	..()
 	qdel(src)
 
-/mob/living/simple_animal/hostile/mimic/MouseEntered(location, control, params)
-	return // Do not call parent: Mimics shouldn't have tooltips!
+/mob/living/simple_animal/hostile/mimic/will_show_tooltip()
+	return FALSE
+
 
 //
 // Crate Mimic

code/modules/mob/mob.dm

@@ -1144,8 +1144,13 @@ mob/proc/yank_out_object()
 /mob/proc/throw_item(atom/target)
 	return
 
+/mob/proc/will_show_tooltip()
+	if(alpha <= EFFECTIVE_INVIS)
+		return FALSE
+	return TRUE
+
 /mob/MouseEntered(location, control, params)
-	if(usr != src && usr.is_preference_enabled(/datum/client_preference/mob_tooltips))
+	if(usr != src && usr.is_preference_enabled(/datum/client_preference/mob_tooltips) && src.will_show_tooltip())
 		openToolTip(user = usr, tip_src = src, params = params, title = get_nametag_name(usr), content = get_nametag_desc(usr))
 
 	..()

code/modules/mob/mob_planes.dm

@@ -11,7 +11,7 @@
 	my_mob = this_guy
 
 	//It'd be nice to lazy init these but some of them are important to just EXIST. Like without ghost planemaster, you can see ghosts. Go figure.
-	
+
 	// 'Utility' planes
 	plane_masters[VIS_FULLBRIGHT] 	= new /obj/screen/plane_master/fullbright						//Lighting system (lighting_overlay objects)
 	plane_masters[VIS_LIGHTING] 	= new /obj/screen/plane_master/lighting							//Lighting system (but different!)
@@ -52,6 +52,10 @@
 	var/obj/screen/plane_master/PM = plane_masters[which]
 	if(!PM)
 		crash_with("Tried to alter [which] in plane_holder on [my_mob]!")
+
+	if(my_mob.alpha <= EFFECTIVE_INVIS)
+		state = FALSE
+
 	PM.set_visibility(state)
 	if(PM.sub_planes)
 		var/list/subplanes = PM.sub_planes