This mod now lets you customize all floor types in the mines and Skull Cave. Currently it lets you customize the following:

Configuration

You customize the dungeons by editing the config.json file in this mod's folder (it will be created automatically the first time you open the game).

Config Explanation:

EnableMod

EnableFloorTypeChanges

EnableTileChanges

PercentChanceMonsterFloor

between 0 and 100

PercentChanceMonsterFloor

between 0 and 100

SlimeDinoMonsterSplitPercents

(should add up to 100)

SlimeMonsterSplitPercents

(should add up to 100)

MinFloorsBetweenMonsterFloors

TreasureChestFloorMultiplier

MinFloorsBetweenTreasureFloors

MonsterMultiplierOn{TYPE}Floors

ItemMultiplierOn{TYPE}Floors

StoneMultiplierOnRegularFloors

GemstoneMultiplierOnRegularFloors

PurpleStoneMultiplier

MysticStoneMultiplier

ResourceClumpChance

ChanceForOresMultiplierInMines

ChanceForOreMultiplier

ChanceForIridiumMultiplier

ChanceForGoldMultiplier

ChanceForIronMultiplier

WeedsChance

WeedsMultiplier

ChanceForLadderInStoneMultiplier

ChanceLadderIsShaftMultiplier

Chances can now be decimal values, except for the three percent ones.

Other Underground Mods

Underground Secrets

Custom Ore Nodes

Custom Resource Clumps

Boss Creatures

Technical

Requires SMAPI, uses Harmony.

Source code is available at https://github.com/aedenthorn/StardewValleyMods/.

If you want to complain or ask for help or help me test my mods, you can visit my Discord server.

A list of all my mods for Stardew Valley is available at https://www.nexusmods.com/stardewvalley/articles/895.

Custom Dungeon Floors