Simplify Tree Rig and Skin
Reduces joint count and skin complexity on a rigged Natsura tree before export. The standard pre-export step for Unreal Nanite Skeletal Assembly.
Simplify Tree Rig and Skin reduces the joint count and the skin complexity of a rigged Natsura tree to a level the target engine can consume efficiently. The standard pre-export step before Export Unreal Nanite Assembly: trees come out of Simulate with a rig that captures every internode, which is more than the engine needs.
For the workflow this sits in, see Working with Assemblies in Unreal; for the export node it precedes, see Export Unreal Nanite Assembly.
Parameters
Settings
| Parameter | Description |
|---|---|
| Keep | Group expression for joints that must be preserved through the simplification. |
| Carve | Toggle and value pair controlling the carving simplification pass. |
| Use Minimum Edge Length | Toggle for minimum-length-based simplification. |
| Minimum Length | The minimum edge length below which joints are collapsed. |
| Skeleton Simplification | Toggle for the skeleton-level simplification. |
| Simplify | Tolerance for skeleton simplification. |
| Use Max Joints | Toggle for an upper-bound joint count. |
| Max Joints | Hard upper limit on joint count. |
| Remove Clusters | Recommended for Unreal Nanite Assemblies. |
Debug
| Parameter | Description |
|---|---|
| mesh / bonecapture / joints / skeleton | Debug expression outputs for inspecting the result. |
Warnings
| Parameter | Description |
|---|---|
| Missing Attribute | Surfaces when expected rig attributes are absent on the input. |
Notes
- For Unreal Nanite Assemblies, enable Remove Clusters. Use Keep groups to preserve joints that wind or animation systems specifically need (typically anchor joints and trunk-base joints).
- Sits between the Simulate (plus decorations) and the Wind Config chain into Export Unreal Nanite Assembly.
See also: Working with Assemblies in Unreal · Simulate · Wind Config · Export Unreal Nanite Assembly