diff --git a/mapgen.lua b/mapgen.lua
index 26163a9..0fa4f10 100644
--- a/mapgen.lua
+++ b/mapgen.lua
@@ -42,6 +42,10 @@ end
 -- special params, so the below func is not necesary. The mt oregen runs in 
 -- separate therad (emerge) and it does not block server.
 -- params: type=scatter scacrity=1 size=3 ores=27 : full chance of spawning, only limited by noise thr
+-- EDIT: Need to edit mg_ore.cpp and Add following ore_types: layer, blob, region.
+   -- layer=2Dheightmap style layer with specific thickness
+   -- blob= 3D noise deformed sphere
+   -- region= 3D noise / treshold ore placement.
 
 rocksl.layergen=function(layer, minp, maxp, seed)
  if   ( (layer.top.offset+layer.top.scale)>minp.y )