Xephyr root window transparent

[Tor Rune Skoglund]

Hello List,

Can Xephyr root windows be made transparent initially?

The use case is that we put up Xephyr on a small part of the screen, but
it should stay "invisible" and show the screen contents behind it until
the user application put some contents into the Xephyr window.

We have been trying parameters like "-background none" and such, but the
Xephyr windows will then be all black and covers the background.

Any hint are highly appreciated.
-- 

Best regards,
*Tor Rune Skoglund*, FourC AS

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