V-Ray physical camera works just like a real world SLR camera

V-Ray physical camera works just like a real world SLR camera

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3D Artist and a CG enthusiast, who loves to learn and share knowledge.

V-Ray physical camera works just like a real world SLR camera. Photographers can understand its various parameters. But it is may be hard to understand for the ones who are new to all these. So here comes the explanation.

V-Ray Physical Camera is of the following types:

1. Still camera

A regular shutter still photo camera.

2. Cinematic camera

A circular shutter motion-picture camera.

3. Video camera

A shutter-less video camera with a CCD matrix.

Here the important parameters are explained:

Exposure Control

f-number (f-stop)

It controls the aperture size of the virtual camera. Lowering the f-number value increases the aperture size and so makes the image brighter and increasing it makes the image darker.

f-numberShutter Speed

It controls the time the film or sensor is exposed to light. The larger the amount, the bright the image is. And It also causes fast moving objects to appear blurry (motion blur).

Shutter SpeedFilm Speed (ISO)

It determines the film sensitivity. High value makes the image brighter and low value makes it darker.


Focal Length

It is set in millimeters. Lower the value wider is the lens and higher value gives tele photo lens effect. Also note that it is scientifically proven that a normal human eye lens’ focal length is about 45 mm. So adjust your focal length accordingly such that it your image doesn’t look funny when you want your viewers to view it seriously.

Focal Length

Zoom Factor

It zooms in and out the image without moving the camera forward and backwards.

Zoom Factor

Vertical and Horizontal Shift

If we want to achieve the “2-point perspective” then adjust the horizontal or vertical shift. To get that done automatically click the “Guess Vertical Shift” or “Guess Horizontal Shift” button.

Vertical Shift


Determines the distortion coefficient for the camera lens. Positive value five “barrel distortion” and negative value gives “pillow distortion”. There are two types of distortion, quadratic and cubic. Cubic distortion is used in camera tracking programs like SynthEyes, Boujou, etc.


Depth of Field (DOF)

This effect can be seen in a real world camera when an object is close to a lens. To achieve this result the camera aperture must be wide open, so, decrease the f-number which gives burnt or very bright image and which is adjustable with lower shutter  speed. Also adjust the focus distance checking on the “specify focus” or adjust the target of the camera. Smaller the value, near is the focus and higher the value, far is the focus.

DOFYou can notice the blurring of the objects which are far from the camera.

Motion Blur

Motion blur is determined according to the speed of a moving object and the shutter speed. Longer the shutter speed, more is the motion blur effect.

Motion Blur


Checking on the vignetting gives the effect of real world camera optical vignetting.


White Balance

It allows additional modification to the output image. For example, daylight exterior should be somewhat peach in color. White color of white balance gives effect, peach color gives bluish tint to image and blue color gives peach tint to image.

White BalanceYou can set your image to neutral and give the color balance later in post work in Photoshop.

So, these are the V-Ray camera’s important parameters discussed. Happy rendering!

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