@1337darkin The image can be captured in any state (PXE/UEFI)
But to boot the system, you need it in the “original” state of creating in the image:
For example::
You have a UEFI booted machine, and you capture the Image over PXE (Legacy) network via Virtual Box
That will be fine, as long as the system that boots is booting in UEFI mode. The “boot” mode is the important piece if that helps?