across different sections of a mesh at a vertex or even texel level.īut yes, this can completely be done with a vertex shader, rather than burning it into your model data. Also, the sobel approach is really super generic, and looks robotic in its implementation, whereas using vertex data starts to give you way more artisanal control over line quality – control width, colour etc. You can, of course, do some clever stuff in shaders to blend between. With a world space geometry shift, the line gets thicker as you get closer to it. With screen space approaches, you get a uniform pixel line. I find the geometric approach can still have qualitative differences from a screen space outline – enough that you’d consider using one over the other.
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