how to render a mesh without anti-aliasing

[mhq6634]

Is there a method to render a human mesh without anti-aliasing? I have tried rendering a human mesh (with iuv values) and want a solid distinction between the background and the human body. However, now I am getting an aliased image instead (as shown in the image below):

[pbsds]

To my understanding, this is work in progress. Here is a hack you could try.