when watching a movie or TV show you can tell exactly what software was used to do certain scenes.
You quickly and easily noticed duplicate fake trees in a movie scene that everyone thinks is real landscape.
You get annoyed at the bad lighting and recoloring that is done in most modern movies.
You start seeing 3D models you own on book covers, in magazine ads, etc.
You annoy your date who was a drama major that has been studying film, by mentioning things about how the movie you two just saw, that she didn’t know or notice. Examples, how the lighting on a scene was done, what was real and what was CG, etc. To make matters worse you degree is in an unrelated field.
You notice that hobbyist on the DAZ forums and other 3D communities that don’t work in the professional 3D community often do better looking renders that most professional 3D stuff you’ve seen, and they use inexpensive software too.
You’re showing off some renders of Victoria to friend. Then another friend comes up who doesn’t know that they are renders and thinks your renders are photographs and asks you to introduce him to the “hot chick” in the pictures.