how can i make a round wall?
GeorgeMaras,
I would like to get a little more information from you in order to better understand this question.
What do you mean by round wall? If you could give me some context as to what you are trying to achieve? A round wall is a little vague.
If you are talking about a wall that is part of a rotunda then maybe look into using a cylinder. If you want to bevel the edges of the wall I would recommend using a modeling software such as 3DS Max, Maya, or Blender.
After I have a little more information then I will be able to help you.