Version: 2017.1 (switch to 2017.2b)
Description of the Format
YAML Class ID Reference
Other Versions

An Example of a YAML Scene File

An example of a simple but complete scene is given below. The scene contains just a camera and a cube object. Note that the file must start with the two lines

%YAML 1.1
%TAG !u! tag:unity3d.com,2011:

…in order to be accepted by Unity. Otherwise, the import process is designed to be tolerant of omissions - default values will be supplied for missing property data as far as possible.

%YAML 1.1
%TAG !u! tag:unity3d.com,2011:
--- !u!header
SerializedFile:
  m_TargetPlatform: 4294967294
  m_UserInformation: 
--- !u!29 &1
Scene:
  m_ObjectHideFlags: 0
  m_PVSData: 
  m_QueryMode: 1
  m_PVSObjectsArray: []
  m_PVSPortalsArray: []
  m_ViewCellSize: 1.000000
--- !u!104 &2
RenderSettings:
  m_Fog: 0
  m_FogColor: {r: 0.500000, g: 0.500000, b: 0.500000, a: 1.000000}
  m_FogMode: 3
  m_FogDensity: 0.010000
  m_LinearFogStart: 0.000000
  m_LinearFogEnd: 300.000000
  m_AmbientLight: {r: 0.200000, g: 0.200000, b: 0.200000, a: 1.000000}
  m_SkyboxMaterial: {fileID: 0}
  m_HaloStrength: 0.500000
  m_FlareStrength: 1.000000
  m_HaloTexture: {fileID: 0}
  m_SpotCookie: {fileID: 0}
  m_ObjectHideFlags: 0
--- !u!127 &3
GameManager:
  m_ObjectHideFlags: 0
--- !u!157 &4
LightmapSettings:
  m_ObjectHideFlags: 0
  m_LightProbeCloud: {fileID: 0}
  m_Lightmaps: []
  m_LightmapsMode: 1
  m_BakedColorSpace: 0
  m_UseDualLightmapsInForward: 0
  m_LightmapEditorSettings:
    m_Resolution: 50.000000
    m_LastUsedResolution: 0.000000
    m_TextureWidth: 1024
    m_TextureHeight: 1024
    m_BounceBoost: 1.000000
    m_BounceIntensity: 1.000000
    m_SkyLightColor: {r: 0.860000, g: 0.930000, b: 1.000000, a: 1.000000}
    m_SkyLightIntensity: 0.000000
    m_Quality: 0
    m_Bounces: 1
    m_FinalGatherRays: 1000
    m_FinalGatherContrastThreshold: 0.050000
    m_FinalGatherGradientThreshold: 0.000000
    m_FinalGatherInterpolationPoints: 15
    m_AOAmount: 0.000000
    m_AOMaxDistance: 0.100000
    m_AOContrast: 1.000000
    m_TextureCompression: 0
    m_LockAtlas: 0
--- !u!196 &5
NavMeshSettings:
  m_ObjectHideFlags: 0
  m_BuildSettings:
    cellSize: 0.200000
    cellHeight: 0.100000
    agentSlope: 45.000000
    agentClimb: 0.900000
    ledgeDropHeight: 0.000000
    maxJumpAcrossDistance: 0.000000
    agentRadius: 0.400000
    agentHeight: 1.800000
    maxEdgeLength: 12
    maxSimplificationError: 1.300000
    regionMinSize: 8
    regionMergeSize: 20
    tileSize: 500
    detailSampleDistance: 6.000000
    detailSampleMaxError: 1.000000
    accuratePlacement: 0
  m_NavMesh: {fileID: 0}
--- !u!1 &6
GameObject:
  m_ObjectHideFlags: 0
  m_PrefabParentObject: {fileID: 0}
  m_PrefabInternal: {fileID: 0}
  importerVersion: 3
  m_Component:
  - 4: {fileID: 8}
  - 33: {fileID: 12}
  - 65: {fileID: 13}
  - 23: {fileID: 11}
  m_Layer: 0
  m_Name: Cube
  m_TagString: Untagged
  m_Icon: {fileID: 0}
  m_NavMeshLayer: 0
  m_StaticEditorFlags: 0
  m_IsActive: 1
--- !u!1 &7
GameObject:
  m_ObjectHideFlags: 0
  m_PrefabParentObject: {fileID: 0}
  m_PrefabInternal: {fileID: 0}
  importerVersion: 3
  m_Component:
  - 4: {fileID: 9}
  - 20: {fileID: 10}
  - 92: {fileID: 15}
  - 124: {fileID: 16}
  - 81: {fileID: 14}
  m_Layer: 0
  m_Name: Main Camera
  m_TagString: MainCamera
  m_Icon: {fileID: 0}
  m_NavMeshLayer: 0
  m_StaticEditorFlags: 0
  m_IsActive: 1
--- !u!4 &8
Transform:
  m_ObjectHideFlags: 0
  m_PrefabParentObject: {fileID: 0}
  m_PrefabInternal: {fileID: 0}
  m_GameObject: {fileID: 6}
  m_LocalRotation: {x: 0.000000, y: 0.000000, z: 0.000000, w: 1.000000}
  m_LocalPosition: {x: -2.618721, y: 1.028581, z: 1.131627}
  m_LocalScale: {x: 1.000000, y: 1.000000, z: 1.000000}
  m_Children: []
  m_Father: {fileID: 0}
--- !u!4 &9
Transform:
  m_ObjectHideFlags: 0
  m_PrefabParentObject: {fileID: 0}
  m_PrefabInternal: {fileID: 0}
  m_GameObject: {fileID: 7}
  m_LocalRotation: {x: 0.000000, y: 0.000000, z: 0.000000, w: 1.000000}
  m_LocalPosition: {x: 0.000000, y: 1.000000, z: -10.000000}
  m_LocalScale: {x: 1.000000, y: 1.000000, z: 1.000000}
  m_Children: []
  m_Father: {fileID: 0}
--- !u!20 &10
Camera:
  m_ObjectHideFlags: 0
  m_PrefabParentObject: {fileID: 0}
  m_PrefabInternal: {fileID: 0}
  m_GameObject: {fileID: 7}
  m_Enabled: 1
  importerVersion: 2
  m_ClearFlags: 1
  m_BackGroundColor: {r: 0.192157, g: 0.301961, b: 0.474510, a: 0.019608}
  m_NormalizedViewPortRect:
    importerVersion: 2
    x: 0.000000
    y: 0.000000
    width: 1.000000
    height: 1.000000
  near clip plane: 0.300000
  far clip plane: 1000.000000
  field of view: 60.000000
  orthographic: 0
  orthographic size: 100.000000
  m_Depth: -1.000000
  m_CullingMask:
    importerVersion: 2
    m_Bits: 4294967295
  m_RenderingPath: -1
  m_TargetTexture: {fileID: 0}
  m_HDR: 0
--- !u!23 &11
Renderer:
  m_ObjectHideFlags: 0
  m_PrefabParentObject: {fileID: 0}
  m_PrefabInternal: {fileID: 0}
  m_GameObject: {fileID: 6}
  m_Enabled: 1
  m_CastShadows: 1
  m_ReceiveShadows: 1
  m_LightmapIndex: 255
  m_LightmapTilingOffset: {x: 1.000000, y: 1.000000, z: 0.000000, w: 0.000000}
  m_Materials:
  - {fileID: 10302, guid: 0000000000000000e000000000000000, type: 0}
  m_SubsetIndices: 
  m_StaticBatchRoot: {fileID: 0}
  m_LightProbeAnchor: {fileID: 0}
  m_UseLightProbes: 0
  m_ScaleInLightmap: 1.000000
--- !u!33 &12
MeshFilter:
  m_ObjectHideFlags: 0
  m_PrefabParentObject: {fileID: 0}
  m_PrefabInternal: {fileID: 0}
  m_GameObject: {fileID: 6}
  m_Mesh: {fileID: 10202, guid: 0000000000000000e000000000000000, type: 0}
--- !u!65 &13
BoxCollider:
  m_ObjectHideFlags: 0
  m_PrefabParentObject: {fileID: 0}
  m_PrefabInternal: {fileID: 0}
  m_GameObject: {fileID: 6}
  m_Material: {fileID: 0}
  m_IsTrigger: 0
  m_Enabled: 1
  importerVersion: 2
  m_Size: {x: 1.000000, y: 1.000000, z: 1.000000}
  m_Center: {x: 0.000000, y: 0.000000, z: 0.000000}
--- !u!81 &14
AudioListener:
  m_ObjectHideFlags: 0
  m_PrefabParentObject: {fileID: 0}
  m_PrefabInternal: {fileID: 0}
  m_GameObject: {fileID: 7}
  m_Enabled: 1
--- !u!92 &15
Behaviour:
  m_ObjectHideFlags: 0
  m_PrefabParentObject: {fileID: 0}
  m_PrefabInternal: {fileID: 0}
  m_GameObject: {fileID: 7}
  m_Enabled: 1
--- !u!124 &16
Behaviour:
  m_ObjectHideFlags: 0
  m_PrefabParentObject: {fileID: 0}
  m_PrefabInternal: {fileID: 0}
  m_GameObject: {fileID: 7}
  m_Enabled: 1
--- !u!1026 &17
HierarchyState:
  m_ObjectHideFlags: 0
  expanded: []
  selection: []
  scrollposition_x: 0.000000
  scrollposition_y: 0.000000

Description of the Format
YAML Class ID Reference