How to set the depth of field of VR camera and how to make it?

1, we now create a physical camera in the scene, as shown in the figure below. Put it in the right position and height.

2.① Check the enabled depth of field. At this time, we can see that there are three lines at the target point of the camera. ② Position is the clearest position we can see, ③-④ is this clear range, and other places are blurred, so when we create a camera, the position of the target point is very important, which directly determines the object we need to use the depth of field.

3. Adjust the camera parameters as shown below. ① Under the exposure control, adjust the brightness of the camera to the whole scene by using the target parameters. The larger the value, the darker the scene, and the smaller the value, the brighter the scene.