Cine Camera Change DoF Method?

In UE 4.13 how do you change the method of DoF?

I’ve gone through the cine camera and went into the post-process section and tried adjusting the DoF but nothing changes. I’ve used the command “r.DepthOfFieldQuality = 4” to make it look better but it still appears grainy. I don’t have a post-process volume in my scene, I’d tried adding one but it didn’t make a difference.

I only plan to export a cinematic and not use it for gameplay, so I’d ideally like to get a higher quality DoF.