World Preview NeoForged
This is an unofficial port of the World Preview. The original mod did support 1.21.x but its only in fabric and forge modloaders. It was a vital mod for my use cases so I decided to port this incredibly versatile tool so the setup is easier especially when you are on the lookout for the perfect spawn.
IMPORTANT
However TFC does not have full compatibility with this port but World Preview TFC does.
Previews
Here are some of the previews provided by the mod.
Biomes

Structure locations

HeightMap

Y-intersection (Mask at a specific Y intersection)

How to Install World Preview NeoForged (Mod)
World Preview NeoForged by DviousDingle is verified for Neoforge across Minecraft versions 1.21.1 (latest release: 1.3.1, file size: 354 KB). Follow the steps below to install it safely from ModCraft.tv:
- Click the Download button above and select your Minecraft version (1.21.1) and platform (Neoforge).
- Make sure you have the compatible loader or environment installed for Neoforge.
- Move the downloaded World Preview NeoForged file into your Minecraft
.minecraft/modsfolder and launch the game.