diff --git a/ign.lua b/ign.lua
index b2b6f1f..a3c221c 100644
--- a/ign.lua
+++ b/ign.lua
@@ -2,24 +2,6 @@
 -- Igneous Layer
 --
 
-local ign={
- name="ign",
- top={
-  offset = -10, scale = 0,
-  spread = {x=80, y=80, z=80},
-  octaves = 0, persist = 0 },
- bot={
-  offset = -180, scale = 10, seed=rocksl.GetNextSeed(),
-  spread = {x=80, y=80, z=80},
-  octaves = 2, persist = 0.7 },
- primary={ name="rocks:basalt" },
- localized={},
- stats={ count=0, total=0, node={}, totalnodes=0 },
- debugging=nil
-}
-
-rocks.layer_initialize(ign)
-
 -- Basalt       Ex/Mafic   hard  same as diorite, byt limit=0.5
 minetest.register_node( "rocks:basalt", {  
 	description = S("Basalt"),
@@ -27,6 +9,10 @@ minetest.register_node( "rocks:basalt", {
 	groups = {cracky=3, stone=1}, 
 	is_ground_content = true, sounds = default.node_sound_stone_defaults(),
 })
+minetest.register_alias("mapgen_stone", "rocks:basalt")
+
+-- ^ does not work. Seems we can not overwrite an alias.
+-- If the alias in default/mapgen.lua is deleted, this works.
 
 -- more rock defs
 minetest.register_node( "rocks:granite", {  
@@ -49,7 +35,22 @@ minetest.register_node( "rocks:gabbro", {
 })
 
 local reg=function(name,param)
- rocksl.register_stratus(ign,name,param)
+ minetest.register_ore({
+   ore    = name,
+   wherein= { "mapgen_stone" },
+   ore_type       = "scatter",
+   clust_scarcity = 10^3,
+   clust_num_ores = 20^3,
+   clust_size     = 20,
+   height_min     = -31000,
+   height_max     = -5,
+   noise_treshhold=param.treshold,
+   noise_params={
+          offset = 0, scale = 1, octaves = 3, persist = 0.5,
+          spread = {x=param.spread, y=param.height, z=param.spread},
+          seed=rocksl.GetNextSeed(),
+        },
+        })
 end
 rocks.register_igneous_stratus=reg
 
@@ -59,16 +60,35 @@ rocks.register_igneous_stratus=reg
  reg("rocks:gabbro",  { spread=40, height=32, treshold=0.36})
 
 -- vein stuff
-ign.veins={}
 
-local regv=rocks.register_vein
+local regv=function(name,param)
+ minetest.log("error","stub called, rocks.register_vein")
+ minetest.register_ore({
+   ore    = name,
+   wherein= param.wherein,
+   ore_type       = "blob",
+   clust_scarcity = param.rarity^3,
+   clust_num_ores = 8,
+   clust_size     = 10*2,
+   height_min     = -31000,
+   height_max     = 50,
+   noise_threshhold = 0.5, --< determined experimentally
+   noise_params={
+          offset = 1-param.radius.amplitude, scale = param.radius.amplitude, octaves = 3, persist = 0.5,
+          spread = {x=param.radius.frequency, y=param.radius.frequency, z=param.radius.frequency},
+          seed=rocksl.GetNextSeed(),
+        },
+  })
+end
+
+rocks.register_vein=regv
 
 rocks.register_vein("default:nyancat",{
-  wherein={"rocks:granite"},
+  wherein={"rocks:granite", "air"},
   miny=-160, maxy=20,
-  radius={ average=10, amplitude=4, frequency=8 },
+  radius={ average=10, amplitude=0.1, frequency=8 },
   density=100,
-  rarity=0.0025, -- this^3*mapblock_volume veins per mapblock
+  rarity=70, -- this^3*mapblock_volume veins per mapblock
   ores={
     { ore="default:sand", percent=30 },
     { ore="default:dirt", percent=30 },
diff --git a/init.lua b/init.lua
index e0e7b74..e38ff1e 100644
--- a/init.lua
+++ b/init.lua
@@ -25,7 +25,7 @@ end
 local modpath=minetest.get_modpath(minetest.get_current_modname())
 
 dofile(modpath.."/sed.lua")
---dofile(modpath.."/ign.lua")
+dofile(modpath.."/ign.lua")
 --dofile(modpath.."/skarn.lua")
 
 minetest.register_on_mapgen_init(function(mapgen_params)