A colleague has pointed out to me that there exists 400 square kilometres of Martian terrain data. It runs in Unreal Engine 5. Check this out:
https://store.epicgames.com/en-US/p/nasa-xoss-marsxr-editor
Not many can claim 25 years on the Internet! Join us in celebrating this milestone. Learn more about our history, and thank you for being a part of our community!