Cubic rigid bends?

Hi!

I am making a game based around cubes and I want my characters arms and legs to bend. To make it as cubic as possible, I would like to have rigid bends. Like this:

I am using Cinema 4D to do this. But when I search on YouTube or google, it all ends up with using xpresso. Unity doesn't care about the Cinema 4D tags when I export the model as a FBX. So do anyone know how I can make rigid bends that works in Unity?

Thanks