Bar Hopping

By R5D8, in Imperial Assault Rules Questions

Very Minor Spoilers for the first Twin Shadows mission.

In the cantina, the bar itself is difficult terrain, while the back of the bar is normal terrain but "hidden" and

sectioned off with red lines.

When moving from the vault door, can a figure move diagonally into the back of the bar without additional movement costs? Moving diagonally across the difficult terrain but not actually entering that terrain?

Thank you. :)