diff --git a/mods/bg_tree/decompose.lua b/mods/bg_tree/decompose.lua
index 0235b8b..99d4387 100644
--- a/mods/bg_tree/decompose.lua
+++ b/mods/bg_tree/decompose.lua
@@ -32,7 +32,7 @@ local decompose_scores = {
 	leaves_decomposing = 30,
 }
 
-local decompose_cost = 2000
+local decompose_cost = 30000
 
 blockgame.register_increasing_abm({
 	id = modname .. ":decompose",
@@ -40,7 +40,7 @@ blockgame.register_increasing_abm({
 	nodenames = {"group:leaves_decomposing"},
 	-- neighbors = {"group:dirty", "group:leaves_decomposing"},
 	interval = 30,
-	chance = 10,
+	chance = 5,
 	rate = function (pos, node, data)
 		local score = 20
 
@@ -58,7 +58,7 @@ blockgame.register_increasing_abm({
 				end
 			end
 
-			gain = math.floor(gain / distance)
+			gain = math.floor(gain / (distance ^ 3))
 
 			if gain > 0 then
 				score = score + gain