Grey cone

I took this tutorial which covers the basics of VRML 97. Also this one is useful. In just a few minutes I was able to understand the source for the grey cone demo:

#VRML V2.0 utf8

Comment header. Defines the VRML version and charset used.

Shape {

Shape node. Defines all visible objects.

appearance Appearance {

Appearance field. Specifies an Appearance node that defines the look of the geometry. This field is optional and may be omitted.

material Material {
    }

Material field containing a Material node.

}
  geometry Cone {
  }

Geometry field. Indicates which shape is to be drawn

}