[Bug 10435] New: Portal 1.0: Portals don't always appear correctly ( clipping plane / frustum not being respected?)

http://bugs.winehq.org/show_bug.cgi?id=10435

Summary: Portal 1.0: Portals don't always appear correctly
                    (clipping plane / frustum not being respected?)
           Product: Wine
           Version: 0.9.49.
          Platform: PC
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: minor
          Priority: P2
         Component: wine-directx-d3d
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

Often in Portal, instead of seeing through a pair of portals, you end up seeing
what's behind the destination portal - but this depends on the viewing angle
and distance.

It would appear that the clipping plane/frustum (whatever) when the portal is
rendered is modified with respect to the player's position in Portal; or
perhaps it *isn't* modified and is instead rendered with the same clipping
frustum as the main viewpoint.