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Globally scale line thickness. If you have line thickness set per object and they are all different values, and you up the resolution of the render, use this global scale to increase or decrease line thickness of all lines, since they are based on pixel width.

Line Color From

Line ColorOffers a number of different functions to determine line color

Use Line Mask

Mult by line mask from pattern node in AOV NPRlineMask

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Mult by alpha for only inside lines from line detect, don't go off geo

Light Response

Color lines by lighting