OUR APPROACH

A seed is only the beginning.

SeedLookout helps you find a world and reproduce it. The catalogue preserves original sources; the map and search tools use version-specific generation models that run in your browser.

Three different kinds of evidence

• Source-reported: an identified creator or research project published the seed and its features. Our initial collection uses this label.
• Model prediction: a world-generation library calculates a biome, structure or candidate. Explorer and seed-finder results have this status.
• In-game verified: the actual game reproduced a particular claim with a recorded release and settings. No catalogue entry currently has this status.

Match the generation version

Choose the edition and version that generated the chunks you are exploring. Upgraded worlds can contain several generations of terrain. Data packs, experiments, custom world settings and mods can change the result.

The map supports Overworld, Nether and End at the following generation checkpoints. Unlisted patches and previews have not been established as compatible; the tool does not silently substitute another release.

Large Biomes is available for Java Overworld maps. Java accepts numeric and text seeds; Bedrock currently requires the numeric seed. Block-reference datasets have their own visible release labels.

The initial survival catalogue cites Java 1.20.1; its previews deliberately identify the different 1.20.6 model. We have not confirmed that those previews reproduce every source claim.

What the map can tell you

Biome colors describe the selected height slice. Structures use the engine’s placement and available biome checks. Terrain and later generation steps can still prevent a predicted feature. Spawn positions are estimates; a structure marker does not guarantee its rooms, loot or safe standing coordinates.

Terrain shading uses approximate heights. Cave slices show a sampled density model, which can include open sky and does not combine every carver, aquifer and later feature. Ore points sample large-vein noise at the selected Y; they are not a complete map of final ore blocks. Larger views and searches use coarser sampling, and dense layers report their computation limits.

Current specialist coverage

Edition and version controls determine the available layers. The map includes major structures, slime chunks, strongholds, mineshafts, biome highlighting, gateways, geode candidates and selected smaller features. Known structure details, such as bastion type or a predicted End ship, appear only when the model supplies them.

• Java cave and ravine markers identify starting chunks, not entrances or complete underground paths.
• Bedrock dungeon predictions use a partial terrain model. Java dungeons and Java surface lava lakes are not implemented.
• Overworld fossils, Bedrock Nether fossils/dried ghasts, and Bedrock ore/loot prediction are not implemented.
• The enchanted-apple layer checks Java desert-temple chests only. It does not cover every structure that can contain apples.
• The seed finder checks bounded sets of candidates and sampled conditions. It cannot exhaust all Minecraft seeds or guarantee small biome patches are found.

These tools are an independent implementation and do not yet reproduce every feature or release supported by Chunkbase. Exact block generation and full feature accuracy require further comparison with real game worlds.

Open generation models

The explorer uses separate builds of the Java Cubiomes fork and the Bedrock Cubiomes fork. Bedrock has its own random-number and placement rules; Java predictions are not reused as Bedrock results. Build identifiers and licenses are available in the engine manifest and open-source credits.

Credit stays with the source

“Featured by” means a creator included the seed in their published collection. It does not imply that they discovered it, used it in a series or endorsed SeedLookout. Historic worlds link directly to the original Minecraft@Home research projects.

The catalogue is deliberately small. Popularity rankings and advertising are not active. New records need useful information and traceable evidence.