So in short, the drop shadow is faked, its just part of the block definition for the block I use on call outs. I could be more creative and make it a 'fuzzy transparent' I supposed, but this is just to give depth, not win an art contest.
I also use color in the shop drawings, mainly in hatches, which makes for a lot clearer presentation of information in my mind without going all full 3D rendered. Clients seem to like it a lot.. for instance notes requiring follow up or dimensions needing field verification are highlighted on the prints so its much less likely they will miss them.
