editor.staticmesh

Static mesh asset introspection: mesh info, LOD details, collision data, Nanite status, and material slots

`editor.staticmesh.getInfo`

Get comprehensive information about a static mesh asset.

Parameters:

Name	Type	Required	Description
`asset_path`	string	Yes	Full asset path (e.g. /Game/Meshes/SM_Chair)

Returns:

Name	Type	Description
`name`	string	Asset name
`path`	string	Full asset path
`num_lods`	number	Number of LOD levels
`vertex_count`	number	Vertex count at LOD 0
`triangle_count`	number	Triangle count at LOD 0
`bounds`	object	Bounding box/sphere (origin_x/y/z, extent_x/y/z, sphere_radius)
`has_nanite`	boolean	Whether Nanite is enabled
`material_slot_count`	number	Number of material slots
`has_valid_render_data`	boolean	Whether the mesh has valid render data

Example Request:

{ "jsonrpc": "2.0", "id": 1, "method": "editor.staticmesh.getInfo", "params": { "asset_path": "/Game/Meshes/SM_Chair" } }

`editor.staticmesh.getLODs`

Get per-LOD details for a static mesh (vertex count, triangle count, sections, screen size).

Parameters:

Name	Type	Required	Description
`asset_path`	string	Yes	Full asset path

Returns: lods (array of {lod_index, vertex_count, triangle_count, num_sections, num_tex_coords, screen_size})

Example Request:

{ "jsonrpc": "2.0", "id": 2, "method": "editor.staticmesh.getLODs", "params": { "asset_path": "/Game/Meshes/SM_Chair" } }

`editor.staticmesh.getCollision`

Get collision information for a static mesh (complexity, shape counts).

Parameters:

Name	Type	Required	Description
`asset_path`	string	Yes	Full asset path

Returns: has_collision (bool), collision_complexity (string), num_shapes (number), simple_collision_shapes ({spheres, boxes, capsules, convex, tapered_capsules})

Example Request:

{ "jsonrpc": "2.0", "id": 3, "method": "editor.staticmesh.getCollision", "params": { "asset_path": "/Game/Meshes/SM_Chair" } }

`editor.staticmesh.setLODCount`

Set the number of LOD levels for a static mesh.

Parameters:

Name	Type	Required	Description
`asset_path`	string	Yes	Full asset path
`count`	number	Yes	Number of LODs (1 to MAX_STATIC_MESH_LODS)

Returns: success (bool), num_lods (number)

Example Request:

{ "jsonrpc": "2.0", "id": 4, "method": "editor.staticmesh.setLODCount", "params": { "asset_path": "/Game/Meshes/SM_Chair", "count": 4 } }

`editor.staticmesh.setLODScreenSize`

Set the screen size threshold for a specific LOD level.

Parameters:

Name	Type	Required	Description
`asset_path`	string	Yes	Full asset path
`lod_index`	number	Yes	LOD index to configure
`screen_size`	number	Yes	Screen size threshold (0.0–1.0)

Returns: success (bool), lod_index (number), screen_size (number)

Example Request:

{ "jsonrpc": "2.0", "id": 5, "method": "editor.staticmesh.setLODScreenSize", "params": { "asset_path": "/Game/Meshes/SM_Chair", "lod_index": 1, "screen_size": 0.5 } }

`editor.staticmesh.generateLOD`

Auto-generate a LOD level with reduction settings. Configures reduction parameters and rebuilds the mesh.

Parameters:

Name	Type	Required	Description
`asset_path`	string	Yes	Full asset path
`lod_index`	number	Yes	LOD index to generate (must be >= 1)
`percent_triangles`	number	No	Triangle reduction ratio 0.0–1.0 (default 0.5)
`max_deviation`	number	No	Maximum allowed deviation in object space (default 0.0)
`screen_size`	number	No	Optional screen size threshold for this LOD

Returns: success (bool), lod_index, percent_triangles, max_deviation, build_errors (array)

Example Request:

{ "jsonrpc": "2.0", "id": 6, "method": "editor.staticmesh.generateLOD", "params": { "asset_path": "/Game/Meshes/SM_Chair", "lod_index": 1, "percent_triangles": 0.5 } }

`editor.staticmesh.setCollision`

Set the collision complexity for a static mesh.

Parameters:

Name	Type	Required	Description
`asset_path`	string	Yes	Full asset path
`complexity`	string	Yes	Default, SimpleAndComplex, SimpleAsComplex, or ComplexAsSimple

Returns: success (bool), collision_complexity (string)

Example Request:

{ "jsonrpc": "2.0", "id": 7, "method": "editor.staticmesh.setCollision", "params": { "asset_path": "/Game/Meshes/SM_Chair", "complexity": "ComplexAsSimple" } }

`editor.staticmesh.setNaniteEnabled`

Enable or disable Nanite for a static mesh. Triggers a mesh rebuild.

Parameters:

Name	Type	Required	Description
`asset_path`	string	Yes	Full asset path
`enabled`	boolean	Yes	Whether to enable Nanite

Returns: success (bool), nanite_enabled (bool)

Example Request:

{ "jsonrpc": "2.0", "id": 8, "method": "editor.staticmesh.setNaniteEnabled", "params": { "asset_path": "/Game/Meshes/SM_Chair", "enabled": true } }

`editor.staticmesh.getMaterialSlots`

List all material slots with their assigned materials.

Parameters:

Name	Type	Required	Description
`asset_path`	string	Yes	Full asset path

Returns: slots (array of {index, slot_name, material_name, material_path}), count (number)

Example Request:

{ "jsonrpc": "2.0", "id": 9, "method": "editor.staticmesh.getMaterialSlots", "params": { "asset_path": "/Game/Meshes/SM_Chair" } }

`editor.staticmesh.setMaterialSlot`

Assign a material to a specific material slot by index.

Parameters:

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

Returns: success (bool), slot_index, material_name, material_path

Example Request:

{ "jsonrpc": "2.0", "id": 10, "method": "editor.staticmesh.setMaterialSlot", "params": { "asset_path": "/Game/Meshes/SM_Chair", "slot_index": 0, "material_path": "/Game/Materials/M_Metal_Chrome" } }

`editor.staticmesh.getNaniteSettings`

Returns all FMeshNaniteSettings properties for a static mesh.

Parameters:

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

Returns:

Name	Type	Description
`enabled`	bool	Whether Nanite is enabled
`explicit_tangents`	bool	Store explicit tangents
`lerp_uvs`	bool	Interpolate UVs when simplifying
`separable`	bool	Separable flag
`voxel_ndf`	bool	Voxel NDF flag
`voxel_opacity`	bool	Voxel opacity flag
`shape_preservation`	string	"None", "PreserveArea", or "Voxelize"
`generate_fallback`	string	"PlatformDefault" or "Enabled"
`fallback_target`	string	"Auto", "PercentTriangles", or "RelativeError"
`position_precision`	number	Position precision (MIN_INT32 = auto)
`normal_precision`	number	Normal precision (-1 = auto)
`tangent_precision`	number	Tangent precision (-1 = auto)
`bone_weight_precision`	number	Bone weight precision (-1 = auto)
`target_minimum_residency_kb`	number	Target minimum residency in KB
`displacement_uv_channel`	number	Displacement UV channel index
`num_rays`	number	Number of rays for voxel
`voxel_level`	number	Voxel level
`keep_percent_triangles`	number	Percentage of triangles to keep (0-1)
`trim_relative_error`	number	Trim relative error
`fallback_percent_triangles`	number	Fallback mesh triangle percentage (0-1)
`fallback_relative_error`	number	Fallback mesh relative error
`max_edge_length_factor`	number	Max edge length factor
`ray_back_up`	number	Ray back up distance

Example Request:

{ "jsonrpc": "2.0", "id": 11, "method": "editor.staticmesh.getNaniteSettings", "params": { "asset_path": "/Game/Meshes/SM_Chair" } }

`editor.staticmesh.setNaniteSettings`

Applies a bulk partial-update of Nanite settings. Only fields present in the settings object are modified.

Parameters:

Name	Type	Required	Description
`asset_path`	string	Yes	Full asset path
`settings`	object	Yes	Object with any subset of getNaniteSettings fields

Returns: success (bool), fields_set (number)

Example Request:

{ "jsonrpc": "2.0", "id": 12, "method": "editor.staticmesh.setNaniteSettings", "params": { "asset_path": "/Game/Meshes/SM_Chair", "settings": { "enabled": true, "keep_percent_triangles": 0.8 } } }

`editor.staticmesh.getNaniteFallback`

Returns fallback mesh configuration (quick access to commonly-tuned values).

Parameters:

Name	Type	Required	Description
`asset_path`	string	Yes	Full asset path

Returns: generate_fallback (string), fallback_target (string), fallback_percent_triangles (number, 0-1), fallback_relative_error (number)

Example Request:

{ "jsonrpc": "2.0", "id": 13, "method": "editor.staticmesh.getNaniteFallback", "params": { "asset_path": "/Game/Meshes/SM_Chair" } }

`editor.staticmesh.setNaniteFallback`

Sets fallback mesh configuration.

Parameters:

Name	Type	Required	Description
`asset_path`	string	Yes	Full asset path
`fallback_target`	string	No	"Auto", "PercentTriangles", or "RelativeError"
`generate_fallback`	string	No	"PlatformDefault" or "Enabled"
`fallback_percent_triangles`	number	No	Percentage 0-1 (clamped)
`fallback_relative_error`	number	No	Error threshold (min 0)

Returns: success (bool), fallback_target (string), fallback_percent_triangles (number), fallback_relative_error (number)

Example Request:

{ "jsonrpc": "2.0", "id": 14, "method": "editor.staticmesh.setNaniteFallback", "params": { "asset_path": "/Game/Meshes/SM_Chair", "fallback_target": "PercentTriangles", "fallback_percent_triangles": 0.25 } }

`editor.staticmesh.getNaniteStats`

Returns Nanite resource stats for a mesh.

Parameters:

Name	Type	Required	Description
`asset_path`	string	Yes	Full asset path

Returns: nanite_enabled (bool), resource_size_bytes (number), lod0_triangles (number), lod0_vertices (number), num_lods (number), has_valid_render_data (bool)

Example Request:

{ "jsonrpc": "2.0", "id": 15, "method": "editor.staticmesh.getNaniteStats", "params": { "asset_path": "/Game/Meshes/SM_Chair" } }

`editor.staticmesh.getNaniteCVars`

Queries key Nanite runtime CVars (r.Nanite.*).

Parameters:

Name	Type	Required	Description
`prefix`	string	No	Filter prefix (must start with "r.Nanite.", default "r.Nanite.")

Returns: cvars (object, map of CVar name to current value as string), count (number)

Example Request:

{ "jsonrpc": "2.0", "id": 16, "method": "editor.staticmesh.getNaniteCVars", "params": { "prefix": "r.Nanite." } }

`editor.staticmesh.setNaniteCVar`

Sets a single Nanite CVar. Name must start with "r.Nanite." for safety.

Parameters:

Name	Type	Required	Description
`name`	string	Yes	CVar name (must start with "r.Nanite.")
`value`	string	Yes	Value to set

Returns: success (bool), name (string), value (string)

Example Request:

{ "jsonrpc": "2.0", "id": 17, "method": "editor.staticmesh.setNaniteCVar", "params": { "name": "r.Nanite.MaxPixelsPerEdge", "value": "1.0" } }

`editor.staticmesh.listNaniteMeshes`

Finds all Nanite-enabled static meshes in the project.

Parameters:

Name	Type	Required	Description
`path_filter`	string	No	Package path filter (e.g., "/Game/Meshes")

Returns: meshes (array of {name, path, triangle_count}), count (number)

Example Request:

{ "jsonrpc": "2.0", "id": 18, "method": "editor.staticmesh.listNaniteMeshes", "params": { "path_filter": "/Game/Meshes" } }