So recently there was an update to Windows or Gmod which made the in built half life model viewer incompatible, in my opinion it was one of the best and quickest ways to test and edit models without having to reload Garry's mod each time.

If most people try to use it now all they'll see is their model with missing textures. You can launch it with crowbar and force it to find the correct directories but still...it doesn't work.

So! How does everyone test their models in game? Do you just do it the old fashioned way and actually launch the game? Or are there other methods?