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there are pretty kewl parallel lines running from left to right (and vice verse) from the ends of your toes on to the traffic lights
The paving slabs do appear less trapezoidal and more rectangular the further they are away ...[attachment=13917]This is because the further away the slab is, the distance between the closest and furthest edge of each slab is a smaller fraction of the distance from the slab to your eye.Slabs will appear increasingly rectangular with distance but never* appear to be truly rectangular :the left and right edges of the slabs will appear closer and closer to parallel but never* appear truly parallel. [* assuming you are on flat ground]
... it looks like Hollywood might have been involved.