MIRROR DISPLAY WILL NOT SHOW MIRRORED BLOCK THAT ISNT ON THE SCREEN. WE DESIGN MANY "MIRRORABLE PANELS" AND MIRROR DISPLAY HELPS KEEP THINGS VISUALY LINED UP FROM SIDE TO SIDE. IN NX3 IT DIDNT MATTER IF THE BLOCK WAS VISABLE OR NOT...IT MIRRORED IT'S DISPLY.
As for your problem, it's not a matter of whether it's being displayed as much as whether the other bodies are INSIDE the 'clipping planes'. Try going to...
View -> Camera -> Edit...
...and near the bottom of the dialog in the section titled 'Clipping', select the button labeled 'Fit Planes to Extents' and then hit OK. Now check to see if that resolves your problem.
John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Industry Sector
Cypress, CA
DRAW A BLOCK ABOVE Y=0. IF YOU ZOOM OUT AND CLICK MIRROR DISPLAY IT SHOWS BOTH BLOCKS. IF YOU ZOOM IN ON THE MIRRORED BLOCK, FAR ENOUGH TO TAKE THE SOLID BLOCK OUT OF THE PICTURE, THE MIRROR BLOCK WILL DISAPEAR. IN NX3 IT STAYED VISABLE NO MATTER WHAT.