Your not meant to be able to render it outside of MS software. The whole ISO thing was high level game to make a monoply look like a standard. It’s a super long standard with closed binary bit that were meant to be temporary. It only got through at due to outside corruption. Governments are as much at fault as MS for being a sleep at the wheel of stopping monopolies and keep the market functional. ISO is broken if something can be a standard where the reference implementation is closed, let alone have any closed bits.