Galaxy S6 :: Retrieving Photos From TWRP Backup

I have not secured my taken pictures to OneDrive / Dropbox, but I thought a single TWRP backup (on a USB OTG) would be enough.

I was using Edgar28's XtreStoLite 2.1, and wanted to put 2.2 on the S6. I knew v2.2 needed a new bootloader and modem to be loaded in ODIN, so I did.

Before I did that, I made the TWRP backup on the usb stick, so if anything would happen I could go back.

Well, as I usually did with my Note 4 when installing a new ROM, I completely wiped everything except for the microSD card and the USB OTG.

But at that point I forgot the S6 doesn't use the microSD so I would probably be lost of all the photo's (yes because I also forgot to set up OneDrive).

Then I realised I had to go back because I forgot about my photo's. So I put back the modem and boatloader for XtreStoLite 2.1 and loaded the TWRP backup in the restore.

I hoped it'd start right up, but it does not. It comes in a bootloop, even before the animated samsung logo.

So then I tried installing XtreStoLite 2.1 without a wipe, and the system started but I couldn't see my photo's, the were gone.

Then I loaded the original firmware via odin over the backup, and I did see the photo's, but they were all grayed out. Like they were there but you wouldn't be able to see them.

What can I do to restore the photo's from the TWRP backup?