Found a strange discontinuity in the inoise16 output. Never noticed that before. After 2 desperate hours of trying to figure out what I did wrong it turned out that I used an ancient FastLED version (on my old computer) where this function didn´t work as expected. Installed the recent version - now everything works as I wish.
It seems that I´m a bit out of practise… So - important note to myself:
Always have the latest FastLED release installed!
Welcome back! 