iOS -not all ios visual effects are working

[Matthias Rebbe]

Hi,

i want to show a group with a visual effect under iOS.

my script looks like this

show grp "Help" with visual effect push up very fast

This works so far. But i do not get other effects working. I tried so far: iris,  checkerboard, venetian blinds. 

Tried it also with this script

lock screen for visual effect
show grp "help"
unlock screen with visual effect iris open very fast

Nothing.

Is there something i am missing? 

Regards,

Matthias