I couldn’t verify a reliable source for brown bark specifically in Martin’s Order tMod from the material I found, so I don’t want to guess and mislead you. The mod page I found only confirms that Martin’s Order adds new items, tiles, enemies, and NPCs, but it doesn’t show the recipe or drop method for brown bark.

What to try

  • Check the mod’s in-game bestiary, crafting tree, or recipe browser if your tMod setup has one.
  • Look at any bark-related drops from trees or wood-type enemies in the mod’s progression.
  • Search the mod’s wiki or community posts for the exact item name, since mod item names can differ slightly between versions.

Most likely possibilities

  • It may be a crafting material tied to a specific tree type or biome.
  • It may be a drop from chopping a certain tree variant.
  • It may be a quest or NPC trade item if the mod’s progression uses custom town NPCs and treasures.

Best next step

If you want the exact method, the fastest route is to share the item tooltip or a screenshot of the item name from your world, because mod items often have version-specific recipes and drops.