'Is there a way to draw a line on unity terrain with help of surface shader?

I have some Vector3 world positions in correct order which I'm passing into surface shader to draw a line through them. Basically the idea is to show where unit can move to within one turn. For that I want to show a borderline. It's kind of similar to Total War Rome 2 visual effect (the instance pic is attached). Could someone share an idea how to do so? I'm new to shaders :(

I'm interested in yellow area

c++sharpunity3dshader


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