editor.skeletalmesh

Provides introspection of skeletal mesh assets: mesh info, bone hierarchy, morph targets, LODs, sockets, and material slots.

← API Reference

`editor.skeletalmesh.getInfo`

Get general information about a skeletal mesh asset.

Name	Type	Required	Description
`asset_path`	string	Yes	Full asset path (e.g. `/Game/Characters/Mannequin/Mesh/SK_Mannequin`)

Returns

Field	Type	Description
`name`	string	Mesh asset name
`asset_path`	string	Full asset path
`bone_count`	number	Number of bones (raw, excluding virtual bones)
`skeleton_path`	string	Path to the USkeleton asset
`lod_count`	number	Number of LOD levels
`morph_target_count`	number	Number of morph targets (blend shapes)
`material_slot_count`	number	Number of material slots
`has_cloth`	boolean	Whether the mesh has active cloth simulation
`vertex_count`	number	Total vertex count (LOD 0)
`triangle_count`	number	Total triangle count (LOD 0)
`bounds`	object	Bounding box/sphere (origin, box_extent, sphere_radius)

Example Request

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "editor.skeletalmesh.getInfo",
  "params": { "asset_path": "/Game/Characters/Mannequin/Mesh/SK_Mannequin" }
}

Example Response

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "name": "SK_Mannequin",
    "asset_path": "/Game/Characters/Mannequin/Mesh/SK_Mannequin.SK_Mannequin",
    "bone_count": 68,
    "skeleton_path": "/Game/Characters/Mannequin/Mesh/SK_Mannequin_Skeleton.SK_Mannequin_Skeleton",
    "lod_count": 4,
    "morph_target_count": 0,
    "material_slot_count": 1,
    "has_cloth": false,
    "vertex_count": 6828,
    "triangle_count": 12384,
    "bounds": {
      "origin": { "x": 0.0, "y": 0.0, "z": 88.0 },
      "box_extent": { "x": 30.0, "y": 30.0, "z": 90.0 },
      "sphere_radius": 95.0
    }
  }
}

`editor.skeletalmesh.getBones`

Get the bone hierarchy for a skeletal mesh.

Name	Type	Required	Description
`asset_path`	string	Yes	Full asset path to the skeletal mesh

Returns

Field	Type	Description
`bone_count`	number	Total number of bones
`bones`	array	Array of bone objects
`bones[].name`	string	Bone name
`bones[].index`	number	Bone index
`bones[].parent_index`	number	Parent bone index (-1 for root)
`bones[].parent_name`	string	Parent bone name (empty for root)
`bones[].transform`	object	Reference pose transform
`bones[].transform.translation`	object	Position {x, y, z}
`bones[].transform.rotation`	object	Quaternion {x, y, z, w}
`bones[].transform.scale`	object	Scale {x, y, z}

Example Request

{
  "jsonrpc": "2.0",
  "id": 2,
  "method": "editor.skeletalmesh.getBones",
  "params": { "asset_path": "/Game/Characters/Mannequin/Mesh/SK_Mannequin" }
}

`editor.skeletalmesh.getMorphTargets`

List all morph targets (blend shapes) on a skeletal mesh.

Name	Type	Required	Description
`asset_path`	string	Yes	Full asset path to the skeletal mesh

Returns

Field	Type	Description
`morph_target_count`	number	Number of morph targets
`morph_targets`	array	Array of morph target name strings

Example Request

{
  "jsonrpc": "2.0",
  "id": 3,
  "method": "editor.skeletalmesh.getMorphTargets",
  "params": { "asset_path": "/Game/Characters/Face/SK_Face" }
}

Example Response

{
  "jsonrpc": "2.0",
  "id": 3,
  "result": {
    "morph_target_count": 3,
    "morph_targets": ["Smile", "Frown", "Blink"]
  }
}

`editor.skeletalmesh.getLODs`

Get per-LOD details for a skeletal mesh.

Name	Type	Required	Description
`asset_path`	string	Yes	Full asset path to the skeletal mesh

Returns

Field	Type	Description
`lod_count`	number	Total number of LODs
`lods`	array	Array of LOD detail objects
`lods[].lod_index`	number	LOD level index
`lods[].screen_size`	number	Screen size threshold for LOD transition
`lods[].has_been_simplified`	boolean	Whether this LOD was auto-generated
`lods[].allow_cpu_access`	boolean	Whether CPU access is enabled
`lods[].vertex_count`	number	Total vertices in this LOD
`lods[].triangle_count`	number	Total triangles in this LOD
`lods[].section_count`	number	Number of mesh sections
`lods[].active_bone_count`	number	Bones used in this LOD
`lods[].required_bone_count`	number	Bones required for rendering
`lods[].has_cloth`	boolean	Whether any section has cloth data

Example Request

{
  "jsonrpc": "2.0",
  "id": 4,
  "method": "editor.skeletalmesh.getLODs",
  "params": { "asset_path": "/Game/Characters/Mannequin/Mesh/SK_Mannequin" }
}

`editor.skeletalmesh.getSockets`

List all sockets on a skeletal mesh (mesh + skeleton sockets).

Name	Type	Required	Description
`asset_path`	string	Yes	Full asset path to the skeletal mesh

Returns

Field	Type	Description
`socket_count`	number	Number of sockets
`sockets`	array	Array of socket objects
`sockets[].socket_name`	string	Socket name
`sockets[].bone_name`	string	Parent bone name
`sockets[].force_always_animated`	boolean	Whether the bone hierarchy is always evaluated
`sockets[].relative_location`	object	Position offset {x, y, z}
`sockets[].relative_rotation`	object	Rotation offset {pitch, yaw, roll}
`sockets[].relative_scale`	object	Scale {x, y, z}

Example Request

{
  "jsonrpc": "2.0",
  "id": 5,
  "method": "editor.skeletalmesh.getSockets",
  "params": { "asset_path": "/Game/Characters/Mannequin/Mesh/SK_Mannequin" }
}

`editor.skeletalmesh.getMaterialSlots`

List all material slots on a skeletal mesh.

Name	Type	Required	Description
`asset_path`	string	Yes	Full asset path to the skeletal mesh

Returns

Field	Type	Description
`count`	number	Number of material slots
`slots`	array	Array of slot objects
`slots[].index`	number	Slot index
`slots[].slot_name`	string	Material slot name
`slots[].material_name`	string	Assigned material name (or "None")
`slots[].material_path`	string	Assigned material asset path (or empty)

Example Request

{
  "jsonrpc": "2.0",
  "id": 6,
  "method": "editor.skeletalmesh.getMaterialSlots",
  "params": { "asset_path": "/Game/Characters/Mannequin/Mesh/SK_Mannequin" }
}

`editor.skeletalmesh.setMaterialSlot`

Assign a material to a material slot on a skeletal mesh.

Name	Type	Required	Description
`asset_path`	string	Yes	Full asset path to the skeletal mesh
`slot_index`	number	Yes	Material slot index
`material_path`	string	Yes	Full asset path of the material to assign

Returns

Field	Type	Description
`success`	boolean	Whether the operation succeeded
`slot_index`	number	The slot that was modified
`material_name`	string	Name of the newly assigned material
`material_path`	string	Path of the newly assigned material

Example Request

{
  "jsonrpc": "2.0",
  "id": 7,
  "method": "editor.skeletalmesh.setMaterialSlot",
  "params": {
    "asset_path": "/Game/Characters/Mannequin/Mesh/SK_Mannequin",
    "slot_index": 0,
    "material_path": "/Game/Materials/M_Red.M_Red"
  }
}

Example Response

{
  "jsonrpc": "2.0",
  "id": 7,
  "result": {
    "success": true,
    "slot_index": 0,
    "material_name": "M_Red",
    "material_path": "/Game/Materials/M_Red.M_Red"
  }
}