Jump X and moving through a roof

[AdvocatusDeLibello]

Hello there, 

If a unit uses the Jump X keyword, is it able to ignore terrain like a solid roof and effectively "teleport" itself through a roof? Or is the ability to ignore terrain restricted only to horizontal movement? 

[Seth]

Hello,

A unit with the Jump X keyword may ignore terrain of height X or lower when performing a Jump action: impassable or not. This may include roofs, ledges, or overhangs.

Assuming the terrain in your example is not impassable (as units cannot typically end a move upon impassable terrain) and no taller than height X: yes a unit with the Jump keyword may ignore that terrain and move through it (or over, or around!), ending on the new level.

Hope this helps,
Seth