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The Line SOP creates straight lines.
/pa - These X,Y, and Z values set the position of the beginning of the line.
/pb - These X,Y, and Z values set the position of the end of the line.
Number of Points
/points - The number of points the line is made of. Minimum is 2 points.
/texture - Texture addes (0,1) coordinates to the vertices when set to Unit. Creates a rectangle without uv attributes when set to Off.