Community Tutorial Increased Wood And Ore - ASharpPen/Valheim.DropThat GitHub Wiki

Tutorial - Increasing wood and ore

Created by Surxe

This is a worked example of a common single-player use case: multiplying the yield of mineable ore nodes and of wood from trees, without touching monster drops.

In this example we set:

  • Copper 3x, Tin 3x, Iron scrap 3x
  • Silver 2x
  • All wood-type drops from trees 2x (Wood, FineWood, RoundLog, ElderBark, YggdrasilWood, Blackwood)
  • Every other ore left untouched

It also shows how to discover the prefab names and drop indexes for yourself, since those are what the config keys off of.

Read this first - version disclaimer

The prefab names, drop indexes, and default table values shown below were captured against Valheim 0.221.12 (network version 36) with Drop That! 3.1.4 (BepInExPack Valheim 5.4.2333). Game and mod updates regularly rename prefabs, reorder drop indexes, and change default loot tables. This page is not kept in sync with the game and the IDs here will eventually go stale. Always regenerate the debug data (below) against your own install and confirm the names/indexes before trusting a copied config.

Step 1 - Generate the default drop table data

Drop That! can write out every drop table it sees, in the exact same format used by the config files. This is the reliable way to get correct prefab names and indexes.

  1. Open BepInEx/config/drop_that.cfg.

  2. Under the [Debug] section, set:

    WriteDropTablesToFiles = true

  3. Launch the game and load into a world (the dump is written on world load, not at the main menu). You can quit once you are in.

  4. Look in BepInEx/Debug/. You will find:

    • drop_that.drop_table.prefabs.txt - drop tables for world prefabs (this is where ore nodes and trees live)
    • drop_that.drop_table.locations.txt
    • drop_that.drop_table.dungeons.txt

  5. Open drop_that.drop_table.prefabs.txt and search for the node you care about. Each entry is already written as a ready-to-use config block, for example:

    ## DropTable Source: MineRock; 
[MineRock_Copper]
DropChance=100
DropOnlyOnce=False
DropMin=1
DropMax=2

[MineRock_Copper.0]
PrefabName=CopperOre
Weight=0.5
AmountMin=1
AmountMax=1
DisableResourceModifierScaling=False

[MineRock_Copper.1]
PrefabName=Stone
Weight=1
AmountMin=1
AmountMax=1
DisableResourceModifierScaling=False

    From this you can read off exactly which index holds the ore you want to change (.0 = CopperOre here) and its current amounts.

Once you have your IDs, set WriteDropTablesToFiles = false again so it stops rewriting the dump every load.

Step 2 - Write the config

Create or edit BepInEx/config/drop_that.drop_table.cfg.

Two things worth understanding about this system:

  • Drops are weighted tables, not per-item rolls. Each mined chunk of a node rolls the table and may return ore or junk (Stone). So you will not get ore from every hit - mine the whole node and compare the total. When ore does come out, it now comes out multiplied.
  • Trees drop in two stages. The standing tree (a TreeBase) mostly drops seeds/resin, then falls into a log. The actual wood comes from the log's _log_half table (a TreeLog). That is why the wood entries below target *_log_half and not the standing-tree prefab.

We override each existing drop by its index ([Entity.Index]) and change only AmountMin/AmountMax. Nothing new is added, and Stone/other drops are left alone. Note that the parent [Entity] section is included for each table - Drop That expects the main table settings to be present alongside the individual drop overrides.

## ============================================================
## ORES (mineables only - monster drops are not affected)
## ============================================================

## --- Copper 3x ---
[MineRock_Copper]
DropChance=100
DropOnlyOnce=false
DropMin=1
DropMax=2

[MineRock_Copper.0]
PrefabName=CopperOre
AmountMin=3
AmountMax=3

## Big Black Forest boulder with a copper vein
[rock4_copper_frac]
DropChance=100
DropOnlyOnce=false
DropMin=2
DropMax=4

[rock4_copper_frac.1]
PrefabName=CopperOre
AmountMin=3
AmountMax=3

## --- Tin 3x ---
[MineRock_Tin]
DropChance=100
DropOnlyOnce=false
DropMin=3
DropMax=4

[MineRock_Tin.0]
PrefabName=TinOre
AmountMin=3
AmountMax=3

## --- Iron scrap 3x (Swamp muddy scrap piles) ---
## Note the low DropChance: these only drop something part of the time.
## The multiplier applies when they DO drop.
[mudpile_frac]
DropChance=30
DropOnlyOnce=false
DropMin=1
DropMax=1

[mudpile_frac.0]
PrefabName=IronScrap
AmountMin=3
AmountMax=3

[mudpile_old]
DropChance=50
DropOnlyOnce=false
DropMin=1
DropMax=1

[mudpile_old.0]
PrefabName=IronScrap
AmountMin=3
AmountMax=3

[mudpile2_frac]
DropChance=20
DropOnlyOnce=false
DropMin=1
DropMax=1

[mudpile2_frac.0]
PrefabName=IronScrap
AmountMin=3
AmountMax=3

## --- Silver 2x ---
[silvervein_frac]
DropChance=100
DropOnlyOnce=false
DropMin=2
DropMax=3

[silvervein_frac.1]
PrefabName=SilverOre
AmountMin=2
AmountMax=2

## Big Mountains boulder with a silver vein
[rock3_silver_frac]
DropChance=100
DropOnlyOnce=false
DropMin=2
DropMax=3

[rock3_silver_frac.1]
PrefabName=SilverOre
AmountMin=2
AmountMax=2

## ============================================================
## WOOD 2x (from trees only)
## Wood comes from the *_log_half tables, not the standing tree.
## ============================================================

## --- Beech (Meadows) ---
[beech_log_half]
DropChance=100
DropOnlyOnce=false
DropMin=10
DropMax=10

[beech_log_half.0]
PrefabName=Wood
AmountMin=2
AmountMax=2

## --- Birch (Meadows) -> Wood + FineWood ---
[Birch_log_half]
DropChance=100
DropOnlyOnce=false
DropMin=10
DropMax=10

[Birch_log_half.0]
PrefabName=Wood
AmountMin=2
AmountMax=2

[Birch_log_half.1]
PrefabName=FineWood
AmountMin=2
AmountMax=2

## --- Fir (Mountains) ---
[FirTree_log_half]
DropChance=100
DropOnlyOnce=false
DropMin=10
DropMax=10

[FirTree_log_half.0]
PrefabName=Wood
AmountMin=2
AmountMax=2

## --- Oak (Meadows) -> Wood + FineWood ---
[Oak_log_half]
DropChance=100
DropOnlyOnce=false
DropMin=25
DropMax=25

[Oak_log_half.0]
PrefabName=Wood
AmountMin=2
AmountMax=2

[Oak_log_half.1]
PrefabName=FineWood
AmountMin=2
AmountMax=2

## --- Pine (Black Forest) -> Wood + Core wood ---
[PineTree_log_half]
DropChance=100
DropOnlyOnce=false
DropMin=15
DropMax=15

[PineTree_log_half.0]
PrefabName=Wood
AmountMin=2
AmountMax=2

[PineTree_log_half.1]
PrefabName=RoundLog
AmountMin=2
AmountMax=2

## --- Swamp tree -> Wood + Elder bark ---
[SwampTree1_log]
DropChance=100
DropOnlyOnce=false
DropMin=10
DropMax=10

[SwampTree1_log.0]
PrefabName=Wood
AmountMin=2
AmountMax=2

[SwampTree1_log.1]
PrefabName=ElderBark
AmountMin=2
AmountMax=2

## --- Yggdrasil shoot (Mistlands) -> Wood + Yggdrasil wood ---
[yggashoot_log_half]
DropChance=100
DropOnlyOnce=false
DropMin=10
DropMax=10

[yggashoot_log_half.0]
PrefabName=Wood
AmountMin=2
AmountMax=2

[yggashoot_log_half.1]
PrefabName=YggdrasilWood
AmountMin=2
AmountMax=2

## --- Ashlands trees -> Blackwood (+ Wood from logs) ---
[AshlandsTreeLogHalf1]
DropChance=100
DropOnlyOnce=false
DropMin=10
DropMax=10

[AshlandsTreeLogHalf1.0]
PrefabName=Blackwood
AmountMin=2
AmountMax=2

[AshlandsTreeLogHalf1.1]
PrefabName=Wood
AmountMin=2
AmountMax=2

The same pattern extends to any variants not listed here (AshlandsTreeLogHalf2, PineTree_log_halfOLD, other silver/copper boulder fractures, etc.) - find them in your own drop_that.drop_table.prefabs.txt dump and add matching sections.

Step 3 - Test it

You do not need extra mods to verify this in singleplayer - the built-in console covers it. This is the exact chain used to confirm the config end-to-end.

Setup

  1. Add -console to the game's Steam launch options so the F5 console is enabled.
  2. If you are testing on a server, the client must be a server admin (add the SteamID64 to adminlist.txt in the server's save directory), and the server needs a devcommands-enabling mod installed server-side (for example Server devcommands) - a vanilla dedicated server will otherwise reject the spawn/cheat commands. Also remember the drop config itself is server-side: the server must have Drop That! and this drop_that.drop_table.cfg loaded (via start_server_bepinex.sh), since clients use the server's loaded config.
  3. In-game, press F5 and enable cheats plus movement:
devcommands
fly
god

Spawn the tools and one of every harvestable

spawn PickaxeBlackMetal
spawn AxeBlackMetal
spawn MineRock_Copper
spawn MineRock_Tin
spawn silvervein
spawn mudpile2
spawn Beech1
spawn Birch1
spawn Oak1
spawn Pinetree_01
spawn FirTree
spawn SwampTree1

Verify from a single node/part of each. You do not need to clear a whole deposit - one chunk or one log tells you if it is working, as long as you read the result correctly:

  • Deterministic nodes read straight off the total. A tin deposit (MineRock_Tin) rolls 3-4 times for 1 ore each = 3-4 vanilla; at 3x it gives 9-12. (Confirmed: 9 = a 3-roll node x3.)
  • Weighted nodes are read off the drop size, not the total, because each roll randomly picks ore or junk. Watch the individual pickups: copper/tin should come out in stacks of 3, silver in stacks of 2. (Confirmed: copper dropped 3 on a copper roll; silver dropped in 2s.)
  • Low-chance nodes need patience. Swamp scrap piles (mudpile2) only drop something ~20% of chunks; mine several and confirm the scrap arrives in stacks of 3.
  • Trees are a two-stage chop. Fell the tree, then chop the fallen log sections - that is where the wood is. A swamp tree log rolls 10 times, split 50/50 Wood/ElderBark, each doubled. (Confirmed: 12 Ancient Bark = 6 rolls x2, with the other 4 rolls as wood.) An even total that is roughly double the vanilla amount is the tell.

Notes

  • These overrides leave DisableResourceModifierScaling=false, so if you also raise resources via the in-game world modifiers (More/Most resources), that scaling stacks on top of these multipliers.
  • Ore nodes are handled by Drop That's DropTable system (MineRock, MineRock5, DropOnDestroyed), which is separate from the CharacterDrop system used for monster loot. That is why this only affects mineables, not mob drops.