Is it possible to create a symmetry with objects or a piece of building ? To have the same thing on both sides.
When duplicating an object in complex motion and turning it, it is just returned but not symmetrical...
Can you help me ?
Yes, but when you turn with the green wheel, your object is in the other direction but not symmetrical. For example the dragon with the paw on the ball, even if you turn the ball is always on the same side. You see ?
So if I understand you correctly you are looking for an mirror-function? It doesn't exist. You can only reach a similar effect when creating stuff with symmetrical items that are placed in identical positions on both sides to the central axis... And then you can copy&paste all that stuff and simply turn and lock it to the existing half again.
If you are looking to mirror some of the asymmetrical pieces that don't have a paired piece, well you can't. Which pretty much makes those pieces next to useless