Prospecting Drill


Build drills that consume ore-sample templates to grow ore patches in a ring around themselves. Bootstrap from rare worldgen remnants. Vanilla and Space Age compatible.

Tweaks
12 days ago
2.0
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Mining Manufacturing Cheats

Changelog

Version: 1.0.3
Date: 2026-06-29
  Bugfixes:
    - Fixed drills consuming samples but never spawning ore. The internal
      marker item the drill produces was spoilable, and a spoilable crafted
      product ages by the full craft duration, so the one-second marker was
      destroyed the instant the thirty-second grow recipe finished. Markers
      are now non-spoilable and are cleaned up by the script instead, so a
      completed grow cycle reliably places ore.
Version: 1.0.2
Date: 2026-06-26
  Bugfixes:
    - Fixed drills eating samples without producing ore in modsets where a
      second resource yields the same ore item (for example Dredgeworks'
      submerged ores). The drill picked whichever resource came first, which
      could be one that can't sit on dry ground, so nothing spawned. It now
      grows or places the ore variant that actually fits the tile beneath it,
      and grows an adjacent patch by matching the ore it mines to.
Version: 1.0.1
Date: 2026-05-15
  Changes:
    - Space Age is now a hard dependency. The mod relies on spoilage for
      the marker-security model (1-second lifetime on hidden marker items
      prevents inserter or player extraction exploits), and spoilage is a
      Space Age feature, not a base-2.0 feature.
  Bugfixes:
    - Free MK1 drill drop from Prospecting Remnants reduced from 5% to
      0.5%, matching the README's intent that drills are the rarest
      bonus (rarer than the 1% off-planet sample roll). Previously a
      free drill was more likely than the rare-ore samples, inverting
      the design.
Version: 1.0.0
Date: 2026-05-15
  Major Features:
    - Three drill tiers (MK1, MK2, MK3) that consume ore-sample templates
      and grow ore patches in a ring around themselves.
    - Three sample tiers per ore (T1 / T2 / T3) with progressively richer
      recipes and yields (3 / 10 / 50 ore per cycle at base quality).
    - Quality-aware yield scaling: rare and higher samples produce more
      ore per cycle, scaling linearly with quality level.
    - Dynamic per-ore generation: every ore-bearing resource in the
      modset (vanilla, Space Age, and modded) gets purify and sample
      recipes auto-generated.
    - Rare worldgen remnants drop starter samples, including for
      no-ore-patch challenge starts.
  Changes:
    - Configurable spawn surfaces, density, and modded-ore inclusion via
      startup settings.
  Balancing:
    - Productivity has no effect on this mod. All generated recipes set
      allow_productivity = false and the MK3 drill excludes productivity
      from its allowed effects. Ore yield depends on sample tier and
      sample quality only. See README for the reasoning.