modded7/overrides/config/gregtech/worldgen/vein/end/pitchblende_vein.json

{
  "weight": 20,
  "density": 0.25,
  "min_height": 30,
  "max_height": 60,
    "dimension_filter": [
    "name:the_end"
  ],
  "generator": {
    "type": "layered",
    "radius": [
      14,
      16
    ]
  },
  "filler": {
    "type": "layered",
    "values": [
      {
        "primary": "ore:pitchblende"
      },
      {
        "secondary": "ore:pitchblende"
      },
      {
        "between": "ore:uraninite"
      },
      {
        "sporadic": "ore:uraninite"
      }
    ]
  }
}