Use the Freehand Mesh tool to perform intricate mesh modelling.

To create a freehand mesh:

1. In the Warper menu, click Freehand.

   
   

2. Click the edge of a patch, and continue clicking until you complete the mesh.
3. Ctrl-click the final vertex.

To delete a freehand mesh:

1. Click Delete.
2. Click the spline or vertex you want to delete, or click Undo.