Bended Columns

Now look at the side of the brush with it facing the
wall or whatever you'll be connecting it to.  Turn on
the vector tool by hitting 'v' and by selecting the 
pink or green box that faces the wall, pull the edge
of the brush until it is even with the opposing surface.

   

Now select the other side of the brush once again,
drag it to the opposing wall but even with the width
of the brush bottom.  You'll notice that the brush 
looks kind of funky with it's middle looking too thin.
By selecting the remaining vector points inside
and above the middle you can stretch out the brush
untill it is uniform from top to bottom.  When your'e
happy with the way it looks hit 'ctrl+n' to line up the
texture you've used.  That's all there is to it!

   

Now for some finishing touches.