@1337darkin My initial reaction is don’t use virtual box, my second thought is don’t use virtual box…

The thing is that vb uses iPXE as its own internal boot loader, and the issue is chaining with FOG’s version of iPXE. The screen shot you show is VB’s version of iPXE running trying to call snponly.efi where its failing. This is an issue with VB and not specifically with FOG.

I think there is a fix for this but I can’t seem to find it at the moment, google-fu is weak today.

On a totally abstract note. You can capture a uefi image with FOG in bios mode. And on the flip side you can capture a bios disk image in uefi mode. BUT to be able to boot that image after image/deployment the target computer’s firmware needs to match the disk image.