Is it possible to make a single-faced cylinder in Blender? In unreal engine 4 they give us some basic static mesh to work with and well the cylinder has only one face so that when i apply a material to it it renders well. Now here is my problem. 

I am trying to make a prison door with metal bars in it. When i make a cylinder in blender it renders with so many faces. When i bring to ue4 I cant apply any materials to it because it really doesn't come out good. Any thoughts on how to fix that would so much appreciated! 

thank you.
Cylinders have as many faces as you accept when you create them.  Reduce the number of faces when you create a cylinder.  Have the information panels open when you create the cylinder so you can see the information. Press T to show and hide the panel.

You can render a 3D view as a png with a transparent background.  So you could apply the texture to a single plane with little geometry if that suits your situation.