Rendering Wireframe using Playblast
Arnold, and some other renderers, have shaders that can render a wireframe on your models. Unfortunately these render a high density wireframe when you use smooth preview (subdivision surface) to subdivide your model. Here ia a way to get a smoothed mesh rendered with the low resolution wireframe, using Playblast.
To render at the right frame size, check out Previewing your animation, Playblast - Matching the Film gate