How to play with a physical camera in V-Ray?

Vray physical camera is very similar to real camera, and most of its parameters come from real camera. So its adjustment skills are almost the same as those in real photography. For the convenience of narration, a scene is randomly built, lights are lit and rendering parameters are set.

1. Switch the current view to perspective and render.

2. Set up a vray camera and adjust the observation angle, similar to the above picture. I won't say much about this process, and the readers will do it themselves. Render the adjusted physical camera view vrayphysicalcamera0 1 By default,

3. At this time, I found that the scene was very dark. Why can I render a clear image in the perspective view, but I can't see anything in the vr physical camera view?

Anyone who has used a camera knows that if too much light enters the camera, the photo will be overexposed and the picture will look bright; Too little light will be underexposed and the picture will be very dark; We must achieve the normal exposure effect through a series of controls.

4. Analyze the present scene, which is obviously underexposed. There are three main factors that control camera exposure, namely shutter speed, F-number aperture and film speed (iso) sensitivity. These parameters are also found in vr physical cameras.