TYPE: SOP
TITLE: IsoSurface SOP

The IsoSurface operation uses implicit functions to generate isometric
surfaces.  It can be used to visualize grade 12 math homework in 3D.
Alternatively, this operation can be used to visualize a 3D texture
image.

Parameters
    Generate from 3D Texture - Use a 3D texture file to specify
                         density instead of an expression. /image3d

    Implicit Function - Function for implicit surface      /func
                        building.
    Minimum Bound     - The minimum clipping plane         /minx
                        boundary for display.              /miny
                                                           /minz

    Maximum Bound     - The maximum clipping plane         /maxx
                        boundary for display.              /maxy
                                                           /maxz

    3D Texture File   - The path to a 3D texture file      /file

    Texture Channel   - The channel of the 3D texture file /channel
                        which specifies the density field

    Density           - Generate the surface where the texture
                        file has this value                /density

    Divisions         - The density of polygons along the  /divsx
                        xyz axes.                          /divsy
                                                           /divsz

Local Variables
    $X, $Y, $Z        - Variables in the implicit function equation.
