MC Edit - 11 June 2011 - Minecraft files

About

MCEdit is a versatile map editor, designed for moving blocks from one level to another. With it, you can open a level of nearly any type and fly around in glorious 3D with multiple levels of detail! Select millions of blocks and clone them anywhere else in the level. Fill a boxy selection with the block of your choice, or replace one kind of block with another. Export blocks to a "schematic" file for later use. Import a schematic or an entire level into any world using the crane. Move the player or his spawn point. Create and and remove chunks from the world. Fill blackened areas with light. Find bugs!

Selection tool:
Mark a selection using blue and yellow cubes. Here is a selection in progress.
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A selection.
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Brush tool:
Click to place blocks in a pre-arranged formation. Current shapes include Round, Square, and Diamond.

Clone tool:
Quickly copy blocks within the same level. The selected blocks are cloned into the green box and will follow your cursor around until you click.
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Click once, and your duplicate blocks are set down and will begin pulsating. Click again to pick them back up.
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Use the keys E R F to rotate, roll, and flip the blocks.
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Press ENTER or click Clone to expand public housing. The clone is finished when the selection is moved to the newly cloned object.
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Fill tool:
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When you pick the fill tool, choose a block to fill with. Press ENTER to confirm, or press 'R' to go into Replace mode. In Replace mode, the previous block becomes the block you're getting rid of, and it asks you to choose the block to replace with.

Crane tool:
The crane tool lets you import blocks from different sources: It can place blocks previously saved by the pencil to a schematic. It can import .inv files created by INVEdit as chests. It can import an entire level into another level. It will ask you to choose a level or schematic. After you've chosen, the level or schematic will appear in the green box. The blocks are fully loaded and ready to use, even though they appear slowly. Click to set it down.
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Here, I've placed the destroyed city.

As before, you can click to pick the blocks up, and use E R F to rotate, roll, and flip them.
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Press ENTER or click Import to construct. Constructions of up to 64 million blocks should take less than a minute. The copy is done once you regain control. You should press Control-S to save your level now. The lighting recalculation for this city took about 3 minutes on a Core i5.
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Et voila.

Chunk tool:
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When you pick the Chunk tool, the visible selection is automatically expanded to cover all of the chunks it touches. Press Create to create all missing chunks in the selection, ignoring any chunks already present. Press Destroy to remove any chunks within the selection. Use Prune to keep all of the chunks in the selection, and delete the ones outside. All of these will ask you for confirmation because there's no way to undo them.

Finally, you can press Relight to fix any bad lighting within the selected chunks. If other programs leave your level full of black spots, you can fix it with this.