The original post notes that it makes use of Bullet for physics.
This isn’t really true, I feel.
For the former, Panda has both its own internal physics system (aside from the collision system), and integration with Bullet physics.
And for the latter, while it doesn’t include the following out-of-the-box, it has the “simplepbr” module for, well, PBR rendering.
And of course, if you want even more realism, the “renderpipeline” and “complexpbr” modules are available.