Moving in direction on a thin walkable area

[Gepard]

I have this problem: In one room, there is a walkable area maybe 150 on X but just 2 on Y. So it looks like a thin line. In the other room, walkable area looks the same. But if I click in any direction in the first room, my character is moving that direction (on walkable area). But if I do it in the second room, he does nothing. I have to click exactly on the walkable area (which is really thin) to make him move. Why is that?

[Ashen]

It's generally recommended that you don't have walkable areas that thin, for pretty much this reason: they don't always work. Try making it thicker in the Y axis (I think the recommended minimum is 3 pixels thick).

I'm not sure why it works OK in one room but not another, except that thin walkable areas are unrelyable, not completely unuseable - so you might just've got lucky in the first room.

[Gepard]

Is there really no way to do it? Im desperate! Now my character is moving OK in the first room, where the walkable area is 2 pixels thick, also in the second room, where the area is 3 pixels thick, but in the third room I must have a walkable area at least 4 pixels thick! Why?

[Khris]

My guess is it depends on the actual x- and y-coords. Walkable areas should be at least 3 pixels wide, so I think the pathfinding uses coords 0, 3, 6, 9 and so on.
Try going back to 2 pixels in the third room and move the line up or down by one pixel.

[Gilbert]

I think another factor is character's walking speed.
If the character is set to a higher speed, it would be more likely to cause problems when walking on thin areas.