diff --git a/minetest.conf b/minetest.conf
index f7042f5a3..6b6a4d678 100644
--- a/minetest.conf
+++ b/minetest.conf
@@ -1,7 +1,9 @@
-# This is a game specify minetest.conf file, do not edit
+# This is a game specific minetest.conf file, do not edit
 
+# Basic game rules
 time_speed = 72
 
+# Player physics
 movement_acceleration_default = 2.4
 movement_acceleration_air = 1.2
 #movement_acceleration_fast = 10
@@ -20,4 +22,12 @@ movement_liquid_sink = 23
 
 movement_gravity = 10.4
 
+# Mapgen stuff
+
+# altitude_chill and altitude_dry doesn't go well together with MCL2 biomes
+# which already include "snowed" variants as you go higher.
+# humid_rivers would cause the MushroomIsland biome to appear frequently around rivers.
+mgvalleys_spflags = noaltitude_chill,noaltitude_dry,nohumid_rivers,vary_river_depth
+
+# MCL2-specific stuff
 keepInventory = false