Hi @Sven
I’ve done a bit of work with the loading, using your recommandations 
I didn’t touch the images yet but now I’m loading the images one slide at a time…
You can give it a try here:
https://rich.gg/beta/
Thing is, going to jpg I would loose transparency…
So I could have some jpg and some png, but, is it worth the trick ?
In any case I want to thank you again. Those tips you gave me certainly pushed me
to do some work I knew I had to do but felt to lazy to even begin
Also, building this whole project has been quite a lot of work. So at the end you tend to
feel like cutting some corners.
It is good to come back at it 1 year later 