I made a simple model of a house (fig.1) . Now, I want to copy the house and mirror it negative 1 on the Y-axis in global orientation.
It should give me an exact mirrored copy of the original but instead all of the different objects get flipped in unwanted directions (fig.2) .
The house contains multiple objects (roofing, windows, doors, etc.)
I've run into this problem once or twice in the past but did not find a solution or why this is happening, nor could I replicate it in a clean blendfile.
(I know about the transformation orientation settings as well as the different options to set the pivoting point of one or multiple objects.)