melanslag,
You have your line of travel on two adjacent edges of the polygon.
You need to add a cutout at the corner so all the treads do no join at exactly the same spot.
There is a minimum distance but that may be based on how many treads you have.
Exaggerated you need a shape something like this.
Also use a curve if you want winding treads.
Barry.
One of the forum moderators.
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