If I understand correctly, did you create the effect in Photo and import it into Designer (copy & paste)? Because Live Filter cannot be created in Affinity (v1)? Interesting that things which cannot be created are supported by paste... Why not just allow creating live filters in Designer (at Serif devs)? Anyway... thanks for the hint. I hope this (unofficial?) feature works in the future (not tested in v2 yet). Update: There are some bugs e.g. when creating a group. It feels a bit hackish.
Update: It seems this no longer works in V2. I wonder why? Is this for marketing? I bought all programs (Universal License). NOT because of missing features in each program. So why blocking this core features? ...