i was trying to use the great zfilter plugin on some hotspots in 3d space..
but that seems unfortunately not possible cause of this..
yes, sorry, the hotspot/layer effects of zfilter only work in css3d mode, this is technically not a krpano related feature
To have separate filters for single webgl hotspots we'd need a krpano api....
Who knows... maybe somewhen in (a probably distant) future ... 