Support for directional movement modifiers?

Hi yall :slight_smile:

I have a map with a convetor belt running down the middle of it.
The belt speeds up creatures that move along it in one directoin, but slows down cratures that move along it in the opposite direction.

How can I make pathfinding take this into account? Have creatures use the conveyor when moving in one direction, but avoid it when moving in the other direction?

Thanks ~~~