George, my apologies for not replying to your request.
As far as changing line weight in the image above, this is done simply be changing the export size when exporting the 2D image (JPG or PNG), The larger the export, the thinner the lines appear when the image is viewed at the same size. So here are more examples.
These two images are done using the same line style but exported at two different sizes.
http://farm6.staticflickr.com/5076/5883894649_77f3b73f0d_z.jpg
Exported at view size.
http://farm6.staticflickr.com/5267/5884460356_ac114e3930_z.jpg
Exported at 3000 pixels wide.
As you can see, when the images are viewed at the same size, the line weight on larger appears smaller.
Two more examples:
http://farm8.staticflickr.com/7225/7301405032_9c2870273d_z.jpg
Screen size.
http://farm8.staticflickr.com/7071/7301404944_11d91498b5_z.jpg
3000 pixels wide.
Often I want lighter lines in the final image so I'll export the edges separately at a larger size and resize the image in post processing before combining it with the textured image. In fact for image exports when I use my sketchy line styles I very often want thinner lines so I make separate image exports.
http://farm8.staticflickr.com/7072/7282589878_5fb9756879_z.jpg
In this image the lines were exported at 3000 pixels wide while the faces and background image as well as the shadow image were exported at 1564 pixels wide (the view size on my PC). The lines were resized in the image editor to 1564 and then combined with the other two images. The process is very fast and almost automatic for me, now.