MeshInstance3D and CSGShape3D Inputs

Both MeshInstance3D and CSGShape3D are sent to Houdini as mesh geometry. CSGShape3D nodes are automatically converted to mesh format before transmission.

Conversion

MeshInstance3D and CSGShape3D are sent as mesh geometry. CSGShape3D is converted to mesh first.

Common Attributes

The following attributes are available on the Houdini side for both input types:

Attribute Name	Attribute Type	Owner	Description
P	Float3	Point	Point positions
Cd	Float3	Point	Vertex color input. If no source color exists, defaults to white
_hego_surface_id	Int	Prim	Surface index of each primitive (useful for per-surface logic)
_hego_surface_material	String	Prim	Material path for each primitive surface (or empty)
_hego_node_path	String	Prim	Godot scene path of the source node

MeshInstance3D-Specific Attributes

MeshInstance3D inputs include additional attributes:

Attribute Name	Attribute Type	Owner	Description
_hego_resource_path	String	Prim	Mesh resource path from the source MeshInstance3D
_hego_surface_override_material_i	String	Prim	Per-surface override material path (index i), or empty if unset