OK i have asked many thing on this forum but I'm happy to Say that hopefully i can finally give back .
ironically i asked how to do this just a few hours ago but after some tinkering found a way that gives good results
best thing its simple , this will create a wire-framed render of what ever object you want wire-framed.
first create 2 groups both identical of the object to be wire-framed
this part is critical to make this work
in the objects menu select the top group, set this group as render as lines
select the bottom group , set its transparency to 100%
when you render you should have a wire frame like this
Click to view attachment