ooh, at some point altitude checking was added to ABM definitions. Awesome.

dynamic_liquids.lua

@@ -34,17 +34,16 @@ local set_node = minetest.swap_node
 -- Dynamic liquids
 -----------------------------------------------------------------------------------------------------------------------
 
-local disable_flow_above = dynamic_liquid.config.disable_flow_above
-if disable_flow_above == nil or disable_flow_above >= 31000 then
+local disable_flow_above = dynamic_liquid.config.disable_flow_above or 32767
 
--- version without altitude check
-	dynamic_liquid.liquid_abm = function(liquid, flowing_liquid, chance)
+dynamic_liquid.liquid_abm = function(liquid, flowing_liquid, chance)
 	minetest.register_abm({
 		label = "dynamic_liquid " .. liquid .. " and " .. flowing_liquid,
 		nodenames = {liquid},
 		neighbors = {flowing_liquid},
 		interval = 1,
 		chance = chance or 1,
+		y_max = disable_flow_above,
 		catch_up = false,
 		action = function(pos,node) -- Do everything possible to optimize this method
 			local check_pos = {x=pos.x, y=pos.y-1, z=pos.z}
@@ -75,56 +74,9 @@ if disable_flow_above == nil or disable_flow_above >= 31000 then
 	})	
 	dynamic_liquid.registered_liquids[liquid] = flowing_liquid
 	table.insert(dynamic_liquid.registered_liquid_neighbors, liquid)
-	end
-
-else
--- version with altitude check
-	dynamic_liquid.liquid_abm = function(liquid, flowing_liquid, chance)
-		minetest.register_abm({
-			label = "dynamic_liquid " .. liquid .. " and " .. flowing_liquid .. " with altitude check",
-			nodenames = {liquid},
-			neighbors = {flowing_liquid},
-			interval = 1,
-			chance = chance or 1,
-			catch_up = false,
-			action = function(pos,node) -- Do everything possible to optimize this method
-				-- This altitude check is the only difference from the version above.
-				-- If the altitude check is disabled we don't ever need to make the comparison,
-				-- hence the two different versions.
-				if pos.y > disable_flow_above then
-					return
-				end
-				local check_pos = {x=pos.x, y=pos.y-1, z=pos.z}
-				local check_node = get_node(check_pos)
-				local check_node_name = check_node.name
-				if check_node_name == flowing_liquid or check_node_name == "air" then
-					set_node(pos, check_node)
-					set_node(check_pos, node)
-					return
-				end
-				local perm = all_direction_permutations[math.random(24)]
-				local dirs -- declare outside of loop so it won't keep entering/exiting scope
-				for i=1,4 do
-					dirs = perm[i]
-					-- reuse check_pos to avoid allocating a new table
-					check_pos.x = pos.x + dirs.x 
-					check_pos.y = pos.y
-					check_pos.z = pos.z + dirs.z
-					check_node = get_node(check_pos)
-					check_node_name = check_node.name
-					if check_node_name == flowing_liquid or check_node_name == "air" then
-						set_node(pos, check_node)
-						set_node(check_pos, node)
-						return
-					end
-				end
-			end
-		})	
-		dynamic_liquid.registered_liquids[liquid] = flowing_liquid
-		table.insert(dynamic_liquid.registered_liquid_neighbors, liquid)
-	end
 end
 
+
 if dynamic_liquid.config.displace_liquid then
 
 	local cardinal_dirs = {

mineclone.lua

@@ -7,9 +7,9 @@ local water_level = dynamic_liquid.config.water_level
 local springs = dynamic_liquid.config.springs
 
 
-if dynamic_liquid.config.lava then
-	dynamic_liquid.liquid_abm("mcl_core:lava_source", "mcl_core:lava_flowing", lava_probability)
-end
+--if dynamic_liquid.config.lava then
+--	dynamic_liquid.liquid_abm("mcl_core:lava_source", "mcl_core:lava_flowing", lava_probability)
+--end
 
 if dynamic_liquid.config.water then
 	-- override water_source and water_flowing with liquid_renewable set to false

springs.lua

@@ -2,8 +2,8 @@ dynamic_liquid.spring = function(def)
 	local water_source = def.water_source
 	local water_flowing = def.water_flowing
 	local pressure = def.pressure
-	local y_min = def.y_min or -31000
-	local y_max = def.y_max or 31000
+	local y_min = def.y_min or -32768
+	local y_max = def.y_max or 32767
 	local interval = def.interval or 1
 	local chance = def.chance or 1
 	
@@ -16,6 +16,8 @@ dynamic_liquid.spring = function(def)
 		neighbors = {"air", def.water_source, def.water_flowing},
 		interval = interval,
 		chance = chance,
+		min_y = y_min,
+        max_y = y_max-1,
 		catch_up = false,
 		action = function(pos,node)
 			local y = pos.y