Tighter mask for path tracing shade record
Tighter mask for path tracing shade record

Should in general make no difference, because color calculation is masked as well.
Overall active rays instead of only the ones that recently hit something seems more appropriate anyway.

tu500/visionaray,tu500/visionaray,szellmann/visionaray,ukoeln-vis/ctpperf,ukoeln-vis/ctpperf,szellmann/visionaray