Prior to GTA V's PC release, we took a look at the impressive amount of graphics options added to this version of the game. If you have GTA V for the PC, you might be a little overwhelmed with the variety of options, especially since you can't see what they look like without changing your settings.
Well, Youtube user wiliextreme has the answer: a video comparing all of GTA V PC's graphics options. You can check them out and look at the different settings one after another before you make up your mind.
Additionally, the video's creator has answered a few questions on Reddit, such as saying he found no noticeable difference between the different Particle Effect settings.
This should definitely help you decide what GTA V PC graphics options to use.
