3D & SimulationSurface Operators
Flip Polygons
Reverses winding and normals. No field, no transform.
The Flip Polygons node turns the mesh inside out, which fixes a model whose normals point the wrong way.

- No parameters
- Found in the node graph under Surfaces → Topology
The image on the right is the example patch itself. Drag and drop it onto the app, or load it with File → Load, to open the full graph. A sphere with its faces flipped.
Inputs and outputs

| Port | Type | Purpose |
|---|---|---|
| Surface | Surface | The mesh. |
| Surface | Surface | The flipped mesh. |
Parameters
This node has no parameters.
Every slider has a per-parameter animation bar, so it can be animated, audio driven, or MIDI mapped.
Examples
Skydome — a large Sphere, Flip Polygons, an Image Plane texture on the inside.
Troubleshooting
Now the outside is invisible — that is the point. Use a Material with Sides Double if you want both.