Merge pull request #4986 from Citadel-Station-13/upstream-merge-34497

[MIRROR] Adds holy vision (Some mobs can now see blessed tiles)

code/game/objects/effects/blessing.dm

@@ -0,0 +1,18 @@
+/obj/effect/blessing
+	name = "holy blessing"
+	desc = "Holy energies interfere with ethereal travel at this location."
+	icon = 'icons/effects/effects.dmi'
+	icon_state = null
+	anchored = TRUE
+	density = FALSE
+	mouse_opacity = MOUSE_OPACITY_TRANSPARENT
+
+/obj/effect/blessing/Initialize(mapload)
+	. = ..()
+	for(var/obj/effect/blessing/B in loc)
+		if(B != src)
+			return INITIALIZE_HINT_QDEL
+		var/image/I = image(icon = 'icons/effects/effects.dmi', icon_state = "blessed", layer = ABOVE_OPEN_TURF_LAYER, loc = src)
+		I.alpha = 64
+		I.appearance_flags = RESET_ALPHA
+		add_alt_appearance(/datum/atom_hud/alternate_appearance/basic/blessedAware, "blessing", I)