It seems like the answer to the question should be at one of
https://userbase.kde.org/Kdenlive/Manua ... /transform
https://www.mltframework.org/plugins/FilterQtblend/
https://community.kde.org/Kdenlive /??
but especially
https://docs.kde.org/stable5/en/kdenliv ... ml#effects
but i'll mess around with stuff if i gotta. The question is what's the maximum values i can use for a particular case, but for the particulars of the case i'll mess around if i gotta.

Supplementally, If it wasn't clearer in the documentation it'd be nice if the preview pane and numbers in the effect pane worked together more intuitively. But that's a different topic for a different forum or wiki or git or f'ing discord or something. I'll mess around with stuff if i gotta, but...

Didn't mean to sound testy. Just being conversational, letting off steam. Conversational is probably fine for a forum. If this isn't the right place for a post with that subject then what is?

I think this is a good forum to ask questions about or discuss effects and compositions available (or not) in kdenlive. So just go ahead and post your question.