Why do some props don't show up when running the map?

[Da Spud Lord]

Well looks like I'm an idiot, they're prop_static.


And just to make sure in case this happens in the future, how do you change a prop's entity class?

The same way you change the class of any other entity. At the top, where it reads "prop_static" with the dropdown next to it, just type the new class that you want to change it to.