File Types & Suffixes

Type	Suffix	File	Description
Component	fprefab	Prefab	Dynamic types generated based on LObject (Prefabable tag required), including component structure, CDO, etc. R&D stage: Support simple logic editing, compiling, running, debugging. Unified format, including version number, import/export info, object property modification and other info.
	fmap	Level	Level description files, including the objects list and object property modification in the level. Unified format, including version number, import/export info, object property modification in the level and other info.
	setting	Settings	Extensible, editable configuration class files that record property modifications of configuration class objects. Configuration class types include project configuration, editor configuration, etc. Unified format, including version number, import/export info, configuration class object property modification and other info.
	fasset	Asset	Asset description files that record property modifications to the asset. Unified format, including version number,import/ export info, object property modifications and other info.
	fasset_ref	Asset reference	Object asset reference files in a streaming level. The file name records the associated fasset file and layer info.
	cache	Cache	Cache description files that record the property modifications of the cache objects. Cache types including LGameUserConfigBase、LEditorViewportsConfig, etc. Unified format, including version number,import/export info, cache object property modifications and other info.
AI	bt	Behavior tree	Behavior tree node info.
	bb	Blackboard	Contains the info needed to decide or update the decision of a behavior tree node.
Map	dds	Map file	Engine map format on PC platform.
	tif	Map file	Map format used for Art production.
	png	Map file	Map format of engine interface resources, or some other special-purpose formats.
	bmp	Map file	Map format used in Art.
	jpg	Map file	Map format used in Art.
	basis	Map file	Engine map format on mobile platform.
	ico	Map file	Engine icon map format.
Model	xmod	Model data	Model resource format used by the Engine.
	mtl	Material	Model material resource format.
	xmodparams	Model additional parameters	Data format for the secondary modification of the model.
	manimation	Model animation	Model material animation data format used by the Engine.
	st	Model file	External model resources, for SpeedTree 8.0 and above.
	srt	Model file	External model resources, for SpeedTree7.0.
	fbx	Model file	External model resource, standard FBX mode format.
Character and Skinned Animation	xskt	Skeletal or bone animation	Core asset of skinned animation. As a skeleton, for storing the topology and base pose of the skeleton. As animation, for storing a series of time-dependent pose or pose additive data.
	xskt_ext	Skeleton extension file	Contains animation notification, animation synchronization tags, action retargeting and other skeleton extension data.
	actor	Character config file	Configuration files that contain resource references such as character skins, action sets, and related effects.
	actionset	Action set	Configuration files that contain a set of skeletal animation assets and references to the target skeleton.
	anim_sequence	Animation sequence	Composite animation assets based on skeleton assets. It is created by the animation Editor that provides advanced features such as retargeting, root motion, notify, tag-based synchronization, and curve editing on top of the skeleton.
	blend_space	2D blend space	Composite assets based on skeletons and(or) anim sequences. It can receive two input control variables to control the blending between multiple animation sampling points.
	blend_space_1d	1D blend space	Composite asset based on skeletons and/or anim sequences. It can receive one input control variable to control blending between multiple animation sampling points.
	aimoffset_blend_space_2d	2D aim offset blend space	Special blend space assets designed to cope with requirements such as weapon aiming or characters looking somewhere (Look At). It can receive two input control variables to control the blending between multiple animation sampling points.
	aimoffset_blend_space_1d	1D aim offset blend space	Special blend space assets designed to cope with requirements such as weapon aiming or characters looking somewhere (Look At). It can receive one input control variable to control the blending between multiple animation sampling points.
	montage	Montage	Composite animation assets based on Skeletons and(or) Anim Sequences. It allows the linear merging of animation clips referenced from the Skeleton and (or) Animation Sequence into the track, and enables the user to split and reorganize into several custom segments. These custom segments can be played standalone in the pipeline or inserted as external animation sources into designated slots in the animation tree.
	animtree	Animation tree	Composite animation assets. The data-driven animation pipeline realized by defining a set of animation tree nodes.
	rig	Offline retarget rig topology	A set of Rig topology for offline retargeting.
	motion_database	Motion data base	Data storage for the "Motion Matching" editor phase.
	motion_database_c	Baked motion database	Data storage for the "Motion Matching" runtime phase.
Sequence	skill_sequence	Skill sequence	File formats for recording skill sequences, including track data and keyframe data.
Terrain	visual	Terrain visual object	Terrain visual object info log file.
	helper_model	Terrain helper object	Terrain helper object info log file.
	height	Uncompressed height map	Terrain height info file, only required for editing mode, not for project publishing.
	ground	Compressed height map	Terrain height info file
	alphabase	Base alpha blend map data	Terrain base texture (first layer) info log file.
	alphamap	Alpha blend map data	Terrain blend layer texture and weight info log file.
	colordata	Blend color layer in editing mode	Terrain blend color layer info log file, only required for editing mode, not for project publishing.
	colorinfo	Blend color layer mask map	Terrain blend color layer mask info log file.
	colormap	Surface Blend color layer	Terrain blend color layer info log file.
	grassdensity	Grass density	Landscape grass density mask info log file.
	water	Water surface info	Terrain water surface info log file.
	r32	One of the height map export formats	Export format file of terrain height map.
Physics	cobj	Rigid body configuration file	It is an extension of the RLX/RLB file, including information such as material files and collision presets used by the rigid body.
	nxx	Rigid body XML format resource files	Includes rigid body properties and collision body properties configuration.
	nxb	Rigid body binary format resource files	Includes rigid body properties and collision body properties configuration.
	rdl	Ragdoll extension configuration file	It is an extended configuration of the RLX/RLB file, containing configuration info such as ragdoll presets and bone welding relationships, etc.
	rlx	Ragdoll XML format resource files	Contains the configuration info of all skeletal rigid bodies and joint constraints of the ragdoll.
	rlb	Ragdoll binary format resource files	Contains the configuration info of all skeletal rigid bodies and joint constraints of the ragdoll.
	drb	Destruction configuration file	It is an extended configuration of the DEX/DEB file, including the configuration info on whether it is the dynamic destruction and fragmented rigid body.
	dex	XML format destruction resource files	Dumped from the destruction source file (APX/APB), can be loaded and used by the Engine.
	deb	Binary format destruction resource files	Dumped from the destruction source file (APX/APB), can be loaded and used by the Engine.
	chx	XML format fabric source files	Dumped from the Fabric source file (APX/APB), can be loaded and used by the Engine.
	chb	Binary format fabric resource files	Dumped from the Fabric source file (APX/APB), can be loaded and used by the Engine.
	apx	Fabric/Destruction XML format source files	Exported from 3Ds Max/PhysxLab software.
	apb	Fabric/Destruction binary format source files	Exported from 3Ds Max/PhysxLab software.
Sound	wav	FMOD sound files	Audio formats supported by FMOD.
	ogg	FMOD sound files	Audio formats supported by FMOD.
	bank	FMOD banks	Audio formats supported by FMOD.
	mp3	FMOD sound files	Audio formats supported by FMOD.
	event	FMOD sound asset description files	FMOD sound asset description files.
	wem	Wwise streaming audios	Wwise audio format.
	bnk	Wwise banks	Wwise audio format.
Font	otf	Font files	File formats for displaying fonts.
	ttf	Font files	File formats for displaying fonts.
Icon	ani	Animation cursor files for Windows	Animation cursor files format for Windows.
	cur	Static cursor files	Static cursor files format.
Interface	ui	Interface configuration files	File format used by the window.
Effect	effect	Effect	The Engine effects creation datalog files.
	particle	Particle	The Engine particles creation datalog files.
	lensflare	Lens flare	The Engine lens flare effects archive files.
Voxel	veco	Ecology	Including info such as surface materials, foliage, underground ecologies, etc.
	vmtl	Material	Including data such as vertex colors, diffuse maps, normal maps, UV scaling, hardness, etc. used for voxel rendering.
	vog	Random Object Generator	Including info such as the distribution scale of multiple objects in a continuous area, etc.
	vobj	Object	Including info on objects such as scaling ratio, scaling and orientation disturbance values, physics types, etc.
	voga	Object Generation Algorithm	Describing info on objects such as random density, clipping distance, etc.
	cph	Plate	Including info on the height map used for the specified area of the planet, such as the height map exported from the worldmachine.
	vter	Voxel Planet	A complete planet with files recording info such as radius, mountains, seawater and distribution of multiple ecologies.
	npc	NPC	NPCs placed in the voxel scene.
	city	Hash files	Determine if the cache is valid.
Curve	curve	Curve data	Archive format for curves.
Other	ini	INI files	Text file.
	xml	XML files	Text file.
	json	JSON files	A file used to store simple data structures and objects, it is a lightweight data interchange format.
	log	LOG files	LOG files of the Engine.
	package	Resource package files	Data package files for asset files through build process of the Editor.
	out	OUT files	Temporary files generated by the Editor's build process when compiling Lua files.
	projectinfo	Project files	Project configuration files.
	meta	Meta files	Files for recording asset info.
	idres	Language text mapping files	Language text mapping files.
	manifest	Manifest files	Temporary files generated during the Editor build process to record asset file manifests.
	chm	Help document files	Help file system based on HTML file features introduced by Microsoft.
	html	HTML(Hypertext Markup Language)	A markup language.
	md	Markup language	A lightweight markup language.
Code	h	C++ header files	Written in C++, generally only function declarations, macro definitions, function prototypes, etc.are inputted.
	hpp	C++ header files	By mixing the .cpp implementation code into the .h header file, the definition and implementation are included in the same file. Then the caller of the class only needs to include the hpp file instead of adding the cpp to the project for compilation.
	cpp	C++ files	Source code files written in C++.
	inc	Subfiles that can be contained in other header files	Subfiles that can be contained in other header files.
	c	C codes	Source code files written in C.
	lua	Lua scripts	Script files in Lua.
	luast	Script dynamic type files	Use Lua syntax.
	py	Python scripts	Script files written in Python.
	go	Go codes	Script files written in Go.
	fsh	Pixel shaders for mobile platforms	Pixel shaders for mobile platforms.
	vsh	Vertex shaders for mobile platforms	Vertex shaders for mobile platforms.
	hlsl	Shaders for DX	Shaders for DX.
	rc	Resource configuration	Resource configuration files.
	yaml	Compile configuration files	Compile configuration files.
	js	JS scripts	A lightweight, interpreted or just-in-time compiled programming language with function precedence.
Generated File	dll	Dynamic libraries	Dynamic link library files in Windows environment.
	exe	Executable files	Executable program files in Windows environment.
	map	Debug mapping	Debug mapping files.
	pdb	Debug symbols	Debug symbol files.
	lib	Import libraries or static libraries	Import library or static library files.
	so	Dynamic libraries for mobile platforms	Dynamic library files for mobile platforms.
	a	Static libraries for mobile platforms	Static library files for mobile platforms.