TYPE: SOP
TITLE: Trail SOP

The Trail operation will take an input and make a trail of each point of the 
input geometry over the past several frames, then connect the trails in
different ways.

Trail will generate trails of any input geometry, whether it is a cube
translating, a deforming surface, or particles.

When using a Particle or Spring operation as input, it is important to keep the 
trail increment to integer values to ensure a proper behaviour.

Parameters:

    Result Type     - How to construct the trail geometry.
    Trail Length    - Number of frames in trail.                      /length
    Trail Increment - Number of frames to skip in trail.              /inc
    Cache Size      - Number of frames to cache in RAM.               /cache
    Reset Cache     - Resets the cache memory buffer.
    Evaluate Within Frame Range - Clamp evaluation between $FSTART and $FEND,
                      otherwise may evaluate before start frame.
    Connectivity    - How to create the output mesh.
    Close Rows      - Closes the rows in the output mesh.
    Velocity Scale  - Non-uniform scaling of velocity vectors.        /velscale

See Also: Cache
