Speed up specific node checks

1 files changed, 1 insertions, 1 deletions

diff --git a/extra.lua b/extra.lua
index 9f118a5..41d304d 100644
--- a/extra.lua
+++ b/extra.lua
@@ -308,7 +308,7 @@ minetest.register_on_generated(function(minp, maxp)
 		return
 	end
 	local bpos
-	for key, pos in pairs(minetest.find_nodes_in_area(minp, maxp, "default:stone_with_coal")) do
+	for key, pos in pairs(minetest.find_nodes_in_area_under_air(minp, maxp, "default:stone_with_coal")) do
 		bpos = {x = pos.x, y = pos.y + 1, z = pos.z }
 		if minetest.get_node(bpos).name == "air" then
 			if bpos.y > -3000 and bpos.y < -2000 then