3D World (block games)

How to make 3D block games: world editor, custom pieces, player, target, inventory and 3D bodies.

Add the 3D World extension (Premium) and click Open the 3D world editor.
Generate terrain (hills, mountains, island, desert, snow, caves) or start empty.
Tools: place, erase, paint, eyedropper, filled and hollow box, layer, sphere and start point. Y layer shows only up to a height.
Right button orbits, Shift + right pans, the wheel zooms. Ctrl+Z undoes.
In the Pieces tab, draw 16 x 16 blocks (top, sides, bottom) with type, hardness and drops.

player controls turns on W A S D, space and the mouse (click the stage; Esc releases).
The target points at the block in the center: use is a block targeted?, crack, break and place in front of the target.
show hotbar / hearts / crosshair / hand builds the game screen; 1 to 9 and the wheel choose the item.
Sprites get a 3D body (zombie, pig, sheep…) and move with walk towards the player, run away and wander. Sprites without a 3D body appear on top, like a HUD.

See the example Craft 3D: mine and build.