Environment bitmap different in window bkground than render

[palibebeh]

Has any of You experienced this issue?

When I drag a bitmap that I want to be as my background into a viewport window - vrayphyscam - and then hit render it comes out notably moved along Z axis (its higher).
Seems that the bigger the offset of the bitmap (and higher tiling), the stronger is the effect.

any thoughts?

cheers!

Maciej