This was a small inhouse test of our "sketch render" technique. Because it's lo-res you lose the full effect but at 640x480 (presentation) or 720x576 (PAL) resolution the effect of the pencil drawing out a product can look quite stunning. The order of lines can be one at a time or multiple and limited to left-right or back-front.
What's more, we can work from your CAD files, if they are available, and create a whole sequence running from sketch, to colouring in (in, say, marker pen) to the final finished product. What better way to show of the development of a new product to a new client?