Fungus for Toasterboy

How to draw fungus in Rhino

1. create two surfaces 'from network of curves' (cirkels and open curves)
2. copy the outer surface
3. use 'blend surface' to connect the inside and the outside surface and 'create solid'
4. paste the outside surface and 'extract wireframe', 'trim' and 'tube' the vertical lines
5. use 'boolinan difference' to remove the tubes and create the gills