Hey, there are still MANY to be done. If you have any graphics knowledge at all, you're more than half way there. Here's what WM does:
Get a good image and work it until you're satisfied.
Look up the light id's from the games manual.
Make the backglass using the light id's from the manual on the b2s lights.
Not to belittle WM's work in any way, but imo the first thing is the most of the work.
(Tip): Get a spanned
VPM table (if it's been made) and use the light id's from the backglass of the spanned table. They'll be the same ones as in the manual. Saves work.
For a vp (non rom) table it's a bit more complicated, but that's what these videos cover.