Cycles Render reduces workspace by strange cube When I render an image it gets cropped by some kind of cube, making all objects outside invisible. The top view is what I want, the bottom what I get


Do you have any ideas about the reason or the solution?
There is no such cube in my project.

EDIT: Moving everything around (by pressing A and G) changes position of project inside this "room", but does not solve the problem due to animations that would need to be moved separately keyframe by keyframe.
It seems like there is some hidden object in your scene that is not visible in the viewport but still appears in your render.
With the mouse cursor over the 3D view, press Alt + H to unhide all objects in the current scene