I've added a new map that can be used to test the variable terrain costs during a pathfinding search. To access it just do:
./path_test -g ../../adonthell/test path
To start a new pathfinding search press 'P', each time you press it a random location in the map will be chosen, if the character doesn't start to move it means the random location is impossible to reach, so just keep pressing until he moves. :-)
The objective is for the character to only move within the wood path and never through the grass.