Hiya!
I'm trying to edit the Proxmox boot logo just for fun for my personal proxmox server.
I'm watching that the proxmox OVMF firmware its located here:
/usr/share/kvm/OVMF_CODE-pure-efi.fd
I made a backup, and I copy that to my local machine in order to edit.
Then I opened with UEFITool.
And...