World Preview Mod (1.21.1, 1.20.1) allows you to visualize the world before it is generated. When creating a new world, you’ll have access to a new preview tab. When opened, it selects a random seed and creates a biome map. The preview is compatible with third-party mods that modify Overworld generation.

Features:

  • Compatible with most world generation mods.
  • Tested with:
    • Terralith
    • Biomes O’ Plenty
  • Persistent seed storage
  • Highlight specific biomes
  • Highly configurable and extendable
  • CPU usage control: limit cores in Settings → General.

Compatibility Notes

  • Compatible with most mods, including those adding biomes and dimensions.
  • TerraFirmaCraft (TFC): Supported, but the Y-intersection view appears white due to TFC’s generator not providing base column data.

Usage

  • World Preview adds a new Preview tab to the Singleplayer menu.
  • Opening the tab generates a random seed and displays a biome map.
  • By default:
    • Only the Overworld is generated.
    • Structures are hidden.
    • No heightmap is shown.

    These settings can be changed in Settings (top-left button).

  • When enabled:
    • Structure sampling allows toggling structure visibility.
    • Height sampling switches between the biome map and a colorized heightmap.
    • Y-layer sampling shows the current y-layer and one lighter layer below.
  • Supports opening the preview in-game for single-player worlds (experimental).

How to Use

  • Move the preview: Click and drag to move along the X and Z axes.
  • Scroll: Moves through Y-levels (up/down), useful for exploring cave biomes.
  • Zoom: Adjust in Settings → Resolution → Visual size of a chunk.
  • Load sequence when moving:
    • Unsampled biomes
    • Structures (if enabled)
    • Heightmap (if enabled)
    • Adjacent Y-layers (if enabled)

Screenshots:

Requires:

Minecraft Forge or Minecraft Fabric

How to install:

Click the following link to view details: How to Install Mods for Minecraft Java Edition on PC: A Beginner Guide

World Preview Mod (1.21.1, 1.20.1) Download Links

For Minecraft 1.20.1

Forge Version: Download from Server 1 – Download from Server 2

Fabric Version: Download from Server 1 – Download from Server 2

For Minecraft 1.20.2

Forge Version: Download from Server 1 – Download from Server 2

Fabric Version: Download from Server 1 – Download from Server 2

For Minecraft 1.20.4

Forge Version: Download from Server 1 – Download from Server 2

Fabric Version: Download from Server 1 – Download from Server 2

For Minecraft 1.20.6

Forge Version: Download from Server 1 – Download from Server 2

Fabric Version: Download from Server 1 – Download from Server 2

For Minecraft 1.21.1, 1.21

Forge Version: Download from Server 1 – Download from Server 2

Fabric/Quilt Version: Download from Server 1 – Download from Server 2

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