diff --git a/ign.lua b/ign.lua
index b10a5f4..ea2fa5a 100644
--- a/ign.lua
+++ b/ign.lua
@@ -58,12 +58,17 @@ rocks.register_igneous_stratus=reg
 -- vein stuff
 ign.veins={}
 
-rocksl.register_vein(ign.veins,"default:nyancat",{
+local regv=function(name,param)
+ rocksl.register_vein(ign.veins,name,param)
+end
+rocks.register_vein=regv
+
+rocks.register_vein("default:nyancat",{
   wherein="rocks:granite",
   miny=-160, maxy=20,
   radius={ average=10, amplitude=4, frequency=8 },
-  density=1,
-  rarity=0.025, -- this^3*mapblock_volume veins per mapblock
+  density=100,
+  rarity=0.0025, -- this^3*mapblock_volume veins per mapblock
   ores={
     { ore="default:sand", percent=30 },
     { ore="default:dirt", percent=30 },
diff --git a/mapgen.lua b/mapgen.lua
index 6b73514..e0c7d77 100644
--- a/mapgen.lua
+++ b/mapgen.lua
@@ -157,7 +157,8 @@ rocksl.veingen=function(veins,minp,maxp,seed)
         local posc = {x=x+x0,y=y+y0,z=z+z0}
         posi = area:index(posc.x, posc.y, posc.z)
         local nv=noise[noise_ix]
-        if ((x^2)+(y^2)+(z^2))<((vein.radius.average+nv)^2) then
+        local luck=random:next(0,99)
+        if (luck<vein.density) and (((x^2)+(y^2)+(z^2))<((vein.radius.average+nv)^2)) then
          nodes[posi]=primary_ctx
          local luck=random:next(0,99)
          for _,sec in pairs(vein.secondary) do