diff --git a/portal.lua b/portal.lua
index 620d693..c02822a 100644
--- a/portal.lua
+++ b/portal.lua
@@ -44,12 +44,12 @@ This portal seemed to bring us to some kind of heavenly paradise.@1]],
 
 	is_within_realm = function(pos) -- return true if pos is inside the Aether
 		-- TODO: Get these values from mod-wide constants.
-		return (pos.y >= 250 and pos.y <= 1000)
+		return (pos.y >= aether2.lower_bound and pos.y <= aether2.upper_bound)
 	end,
 
 	find_realm_anchorPos = function(surface_anchorPos, player_name)
 		-- TODO: implement a surface algorithm that finds land
-		local destination_pos = {x = surface_anchorPos.x ,y = 500, z = surface_anchorPos.z}
+		local destination_pos = {x = surface_anchorPos.x ,y = aether2.upper_bound, z = surface_anchorPos.z}
 
 		-- a y_factor of 0 makes the search ignore the altitude of the portals (as long as they are in the Aether)
 		local existing_portal_location, existing_portal_orientation = nether.find_nearest_working_portal("aether_portal", destination_pos, 10, 0)