Dig a hole to Y-level 15. If you see only stone, your world is "Bore-Voided."

How to input these seeds:


Before diving into the fix, it is crucial to understand the root cause. Unlike Minecraft, where flat is a distinct world type, Colony Survival relies on procedural generation based on 64-bit seeds. The terrain is generated using multiple octaves of Perlin noise.

When the game updates (e.g., moving from version 0.8 to 0.9 or 1.0), the terrain generation algorithm often changes slightly. A seed that produced a glass-smooth plain in version 0.7 might produce a chaotic badlands in version 1.0. Furthermore, mod conflicts (like the Megacolon or More Monsters mods) can override the base generation files, causing even verified flat seeds to fail.

The "flat world seed fix" refers to either: