Vray region render doesn't align with original image

[tsomek]

Hi all,

Many times when I chose to Region Render, the lines don't quite align with the "original" image.

Any ideas how I can make this go away?

Many thanks!

PS. I can only suspect it's related to my other problem (camera not "steady"), as you can see here
https://sketchucation.com/forums/viewtopic.php?f=322&t=71258