Our Student IDs use both barcodes and QR codes (for scanning into different systems on campus) but I noticed Populi's ID Card templates under Contacts only have barcodes available.
We would like to see the ability to add QR Codes to the ID Card Templates. Even better if those QR Codes can be text fields with the ability to add placeholders so they are more flexible. But otherwise we just use them for the Student ID #.