Pulled from internet, so it's definitely real.
That AI generator sure does a nice job on color schemes. I looked at that a while thinking such a pretty bus and admiring the windshield lines. Thought it was real, like most things I see these days.
Fairly certain that is what the Doors had in mind though...The door knob on the left side alludes to the front opening like an Isetta 300 or as Jim Morrison sang "it has a back door, man."