Maybe I am just naive, but I don't see why taking a photo of a screen, projection, or print out would be hard. Wouldn't it just need even lighting and tripod?
Adding something like a LIDAR and somehow baking that data into the meta data could be fun
Then people will connect their fake image and LIDAR feed to where the CMOS is connected. Like always with half-baked digital attestation chains, laypersons will argue "Oh, but who's gonna do that?" and the reality is that even private modders and hackers are perfectly willing and capable of doing this and will jump on it right away, and if it's just for the fun to distribute a certified picture of an alien giving everyone the finger. Of course, tamper-proof designs would be possible, but they are extremely expensive.
On a side note, the best way to attack this particular camera is probably by attacking the software.
Don't limit your thinking to taking photos - video also works fine. It's how The Mandalorian is produced. Instead of green screens, the actors are in front of floor-to-ceiling LED screens with live rendered CGI.
In old movies, going back to the 1930s and 40s, back-projection is usually seen when characters are driving in a car, and you can usually spot it. These days, not so much.
Adding something like a LIDAR and somehow baking that data into the meta data could be fun