diff --git a/worldeditadditions/init.lua b/worldeditadditions/init.lua
index 7758048..8be8c1a 100644
--- a/worldeditadditions/init.lua
+++ b/worldeditadditions/init.lua
@@ -23,7 +23,7 @@ dofile(worldeditadditions.modpath.."/lib/walls.lua")
 dofile(worldeditadditions.modpath.."/lib/replacemix.lua")
 dofile(worldeditadditions.modpath.."/lib/maze2d.lua")
 dofile(worldeditadditions.modpath.."/lib/maze3d.lua")
-dofile(worldeditadditions.modpath.."/lib/conv/convolution.lua")
+dofile(worldeditadditions.modpath.."/lib/conv/conv.lua")
 
 dofile(worldeditadditions.modpath.."/lib/count.lua")
 
diff --git a/worldeditadditions/lib/conv/convolution.lua b/worldeditadditions/lib/conv/conv.lua
similarity index 100%
rename from worldeditadditions/lib/conv/convolution.lua
rename to worldeditadditions/lib/conv/conv.lua
diff --git a/worldeditadditions/lib/erode/erode.lua b/worldeditadditions/lib/erode/erode.lua
new file mode 100644
index 0000000..d30118d
--- /dev/null
+++ b/worldeditadditions/lib/erode/erode.lua
@@ -0,0 +1,3 @@
+worldeditadditions.erode = {}
+
+dofile(worldeditadditions.modpath.."/lib/erode/snowballs.lua")
diff --git a/worldeditadditions/lib/erode/snowballs.lua b/worldeditadditions/lib/erode/snowballs.lua
new file mode 100644
index 0000000..e834f10
--- /dev/null
+++ b/worldeditadditions/lib/erode/snowballs.lua
@@ -0,0 +1,9 @@
+--[[
+2D erosion algorithm based on snowballs
+Note that this *mutates* the given heightmap.
+@source https://jobtalle.com/simulating_hydraulic_erosion.html
+
+]]--
+function worldeditadditions.erode.snowballs(heightmap, heightmap_size, erosion_params)
+	
+end