WorldEdit

Running a Bukkit(/Spigot/Paper) server? Get WorldEdit from here instead: https://dev.bukkit.org/projects/worldedit

Changes in 7.3.0

•  Added an `//update [sideEffect]` command to apply side effects to a selection
• Added a schematic sharing system and corresponding API, with `/schem share`
• Added WorldEdit version and platform information in schematic metadata
• Added API to clear the contents of a registry
• Added a splatter brush, with configurable decay
• Added support for Sponge Schematics v3, and made specific versions accessible as `sponge.1`, `sponge.2`, and `sponge.3`
• Added a snow smoothing brush and command to smooth layered snow
• Added a `//pos` command to allow making entire selections with a single command
• Added a morph brush to apply morphological dilation and erosion, with simple erode and dilate presets
• Added a custom-build NBT library, allowing access to future improvements and modern NBT constructs
• Lazy-load most NBT data to improve performance and memory usage of some operations
• Added API to disable history tracking in an EditSession, to improve performance for plugins that don't care about history
• Added command suggestions for block properties to dynamic patterns such as hand, offhand, pos1, etc
• Added a feature generator command, `//feature [featureName]`
• Added a structure generator command, `//structure [structureName]`
• Added an API to identify the format of a schematic from an InputStream, rather than a File
• Added a `//placement` command to select the placement type, superseding `//toggleplace`
• Added `min` placement mode to correspond to minimum position of a selection
• Added `max` placement mode to correspond to maximum position of a selection
• Added `world` placement mode to correspond to an absolute world location
• Added `here` placement mode to correspond to the player position as of running the command
• Added `-c` flag to the biome brush to set the biome to the entire column
• Added API to memoize mask calls
• Added a `//trim [mask]` command, to trim a selection to the smallest space without removing blocks that match the mask
• Added a `//cone` command to generate cones
• Added support for setting NBT data in patterns, using SNBT syntax (`//set oak_sign[rotation=12]{'is_waxed':1}`)
• Improve performance of arbitrary shape generations
• Improve "fast" reorder mode and make it default, deprecating alternate reorder modes
• Changed schematic pasting to ignore structure void blocks by default, with a `-v` flag to paste it
• Changed the offset mask to not negate itself by default
• Fixed spline generation not correctly using block centres in some situations
• Improve general performance across the board
• Send biome chunk updates to the client when possible
• Use Minecraft's "DataFixerUpper" system when loading legacy schematics where possible

For more information, check out this post that covers some of the main new features in detail!