I found a workaround to show the texture I set in curtains (for the Start10-Background) to get applied in the W11-Start-menu-Style.

That's pretty neat since it allows for varying levels of transparency (if you select a custom background directly from Start11 there is only one solid level of transparency as far as i can tell). Is this a bug or just a feature coming in a new version that hasn't been made available yet?

example, this was my start10-background:

Here's the same texture being applied on the Start11-menu: