Material to color edges

Hi,
I want to paint the edges, but not all are affected. But why?

Sven

Hi,

Why not just select them all manually through an Edit Mode, attach a new material to those same edges and change its color to the black one?

your ‘Less Than’-node is not doing anything, bacause it was comparing to a negative number and your numbers are all positive after the ‘Absolute’-node. I attached an example with working values, but it does not work properly at some of the corners, because the averaging of positive and negative values in the vector to scalar conversion makes them have some parts that have the same value as the plane faces.

I attached a version that alleviates this issue and also looks way simpler. the important part is to use the vector version of ‘Absolute’, that way the averaging is no problem anymore

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