J.A.C.K.

("Just Another Creation Kit", initially Volatile Hammer Editor, previously Jackhammer, and commonly just ) is a map editor for games with a BSP architecture. is heavily based on , improving upon the experience from by adding many quality of life features inspired by those found in , , and more
 is available for free on its website. A paid version, with some extra features (including auto-update), is also available on .
== Features ==
===General Features===
* Cross-platform editing (Windows and Linux)
* Large memory addressing (64-bit)
* Extensible via plugins
* Supports various game formats and resources
* Customizable color schemes
* Realtime texture effects (transparency, animation, scrolling)
* Improved decal rendering (Half-Life)
* Embedded shader editor (Quake III)
* Large map support (up to 262144 x 262144 units)
* Multiple VisGroups per object
* Textures bound to game configurations
* Loads resources on demand
* Dynamic sky rendering
* Supports curved surfaces (patches) from Quake III engine
===2D View Features===
* Background images with adjustable offset, scale, luminance, and filtering
* Selection while dragging in 3D view
===3D View Features===
* Selection while dragging objects
* Display of origins for models and sprites
* User camera placement, movement, deletion, saving, and loading
===Entity Editing Features===
* Smart mode improvements with preview of assigned key values
* Support for Hexen II
* VMF format import and export (beta)
* Triangulation of non-planar faces
* Incremental saving with version numbering
* Improved entity report with hidden entity management
* Advanced patch texturing functions
===Other Features===
* Tabs in Texture Browser
* Ability to hide triggers and unknown entities
* Texture axes locking during vertex manipulation
* Selection center display in status bar
* Tear-off mode for submenus
* Support for deformVertexes autosprite and autosprite2 in Quake 3 shaders
* Many more minor improvements
===Additional Features (from previous versions)===
* Compile maps within the editor (non-blocking)
* Automatic selection in 3D view
* Improved snap to grid functionality
* Preserve internal connections during copy/paste and clone operations
* Model viewer integration
* Extended FGD format for entity descriptions
* Autosave functionality
* Update checking
* Multilingual support (English, Russian, Ukrainian, Belarusian, Polish)
* Precise model selection in 3D view
* Loading and rendering of portal (*.prt) and hull (*.p0-p3) files
* Assigning random yaw to entities
* Multiple texture fitting
* Texture replacement with scaling
* Context menus for entity creation
For more details, refer to the changelog.
== Trivia ==
* was used to make three of the four deathmatch maps that were added in 25th Anniversary Update. and were built using the free version (1.1.1064), and was built using the Steam version (1.1.2800).
== Support ==
 comes with FGDs for the following games, which have been updated to take advantage of newer features:
* 
** 
** 
** 
* 
** 
** 
** 
* 
** 
** 
Compilers are also included (except for VHLT on the Steam version), but are outdated; see note above.
See :Category:GoldSrc FGDs and :Category:Non-Valve engine FGDs for additional supported games.
== External links ==
* Home page
* Website
* Download page
* Steam page
* HLFX Topic of first alpha.
== References == 
# HLFX Topic of first announcement (Volatile Hammer Editor).
# List of J.A.C.K. features on official website.
Category:Third Party Tools
Category:Third Party GoldSrc Tools
Category:Non-Steam Applications