Currently it's not possible; it would be particularly infernal to synchronize parallax with the screen rotation system, requiring at least 4 parallax files (for each 90º) for each map just for basic rotation.
Not to mention that the tool allows zooming, which would demand high-quality parallax to avoid breaking the visual aspect.
It would be truly incredible, but it's very complicated to implement, and potentially problematic if you allow zooming and screen rotation.