already posted this suggestion to bring back at least "visble in mask" option back in V7...
this was a good way to work around with 1.full rendering and 2nd.rendering with "mask not visble" (render only masks) ---- to get some speedy elemets for all postproduction work with glass materials.
The removal of "visible in Mask" option is quite a headache when working with multi-submaterials and some submaterials are glass to be invisble/visible in masks.
currently this "behaviour" is not possible with V6 and dailyV7 ...as you can't make "glass material" invisible to zdepth/normal etc. and keep the other visible materials on a multi-submaterial object.
Only way would be to detach glass-material and turn it invisible to camera in object property modes - which is not an option in many cases - specially when working with Railclone etc.