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Can't mine downstairs on rock floor beneath building #86602

@vincav

Description

@vincav

Describe the bug

The construction recipe for "Mine Downstairs" doesn't seem to recognize the rock floor.

Attach save file

Phobos-trimmed.tar.gz

debug.log

Steps to reproduce

  1. Level Fabrication to 6 and Survival to 4 (mine shows up as red on the recipe for some reason, but the other screenshot shows I have it at 4)
  2. Gather all materials required for Mine Downstairs recipe
  3. Attempt to use the recipe on rock floor (in my case beneath a burnt-down house)

Expected behavior

Recipe succeeds and a downwards shaft is made

Screenshots

"rock wall" floor listed on the sidebar
Image

Recipe does not recognize it
Image

Skills are high enough, despite Survival showing as red
Image

Debug menu info. I attempted without the debug menu first then tried to force the terrain with it, to no avail
Image

Versions and configuration

  • OS: archlinux
  • Version: f23e270-dirty (cdda-linux-with-graphics-and-sounds-x64-2026-04-19-1740) installed locally
  • Tileset: Chibi_Ultica
  • Mods: [no_npc_food] [personal_portal_storms] (default)

Additional context

Debug menu was not used at all before the bug. Errors sometimes present at load (log should contain one) but I haven't been able to reproduce it. Please inform me if there is any additional context needed

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