Quake3World

I have a problem with rotating an object in Gtk Radiant. I created an oven for my map. After finishing the object I wanted to move and rotate it in its final position. But after rotating, the brushes of the object moved, so now one brush sticks out like a lip. I repeated the process using func_group but it didn’t work either.
Is there a possibility to move the whole object without brushes moving around by themselves? If not, wouldn’t that be a big disadvantage of Gtk Radiant?

Radiant does not like rotated objects very much. Brushes by nature don't like floating point values so rotational calculations don't work very accurately.

Instead, read up on converting brushes to ASE models using Q3Map2. Models can be arbitrarily rotated.