TYPE: SOP
TITLE: Trace SOP

The Trace operation reads an image file and automatically traces it, generating
a set of curves or polygons around areas exceeding a certain brightness. 

Parameters:

Trace
    Threshold         - Minimum brightness level that should be    /thresh
                        traced.
    Add Point Texture - Toggles the creation of point texture UV
                        coordinates.
File Switch
    Image Input       - Name of the file to use.
    Scale to Size     - Loads the file at the specified size rather
                        than its actual size.                      /imagesize 
COP Switch
    COP Path          - The path to the COP to use.
    COP Frame         - Which frame(s) to use from a cop           /copframe
                        composed of a sequence of images.
    Planes            - Which planes to use as the source.

Filters
    Remove Borders    - Attempts to remove borders from the trace.
    Border Width      - The width of border to remove.             /bordwidth
    Resample Shapes   - Enables the manual Step Size option
    Step Size         - The distance between adjacent points.      /step
    Smooth Shapes     - Attempts to round corners.
    Corner Delta      - Value controlling corner smoothing.        /corner
    Fit to Curves     - Attempts to map Bezier curves to trace.
    Fitting Error     - Controls the accuracy of curve fitting.    /error
    Convert to Poly   - Converts Fit to Curves to Polygons.
    Level of Detail   - Density of Polygon points.                 /lod
    Hole Faces        - Bridges all holes in the output for 
                        proper rendering.
