Different weight for navigation polygons

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:bust_in_silhouette: Asked By Andrea

Hello,
is there a way to make navigation polygons “weight” more or less when taken into account during path calculation?
Common example: while building a world using tilemap, you might want some polygon to be a preferential way (streets), and other ways to be slower (hills, rivers) so that the characters might decide if to go through a slightly longer but faster way (following roads) or if to go trough a slightly slower but shorter way (crossing a river instead of circumnavigate it).