just found an optical illusion: the blurry "vertical line" in the middle isn't really there. it just happens when two gradients meet each other.pic.twitter.com/ntrpVaiEOc
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amazing. this is great thanks! (Also I just realised this is same phenomenon as the skeleton / ridges when visualising distance fields, e.g. medial axis, voronoi etc. https://www.shadertoy.com/view/3d23D1 )pic.twitter.com/z81QoFHEsF
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