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This page provides information on Cameras and Camera Settings in V-Ray for Unreal.

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Overview

V-Ray for Unreal works with standard Unreal cameras and Viewports. However, you you will not have exposure control of your camera. To use exposure control and other real-world camera settings you have to use the VRayPhysicalCamera Blueprint Actor.

 

 

 

In order to have maximum visual parity between viewport and render you have to disable some of the Unreal posprocess and lighting components. You can do so from in viewport Show > Post Processing and leave only Depth of Field, Postprocess Material and Vignetting. From Show > Lighting Component uncheck Ambient Occlusion.

 

 

VRayPhysicalCamera Blueprint

The VRayPhysicalCamera is based on the Unreal Camera, therefore all features are present and accessible but only some are supported in the current version. The VRayPhysicalCamera Blueprint Actor is accessible through the Modes panel by searching for VRayPhysicalCamera or from VRayForUnreal > Content > BP > Actors > VRayPhysicalCamera in the Content Browser Tree. Select the Blueprint and drag and drop it in the level.

 

UI Path:||Modes Tab|| >Search Classes > VRayPhysicalCamera

UI Path:||Content Browser|| >VRayForUnreal > Content > BP > Actors > VRayPhysicalCamera






In order to see the VRayForUnreal folder you first have to enable Show Engine Content and Show Plugin Content in View Options of the Content Browser.


 

Camera Settings

The currently supported parameters are:

Current Camera Settings


  • Filmback Settings

    • Sensor Width - Specifies the horizontal size of the film gate in millimeters.

    • Sensor Height - Specifies the vertical size of the film gate in millimeters.

  • Focus Settings

    • Focus Method - Specifies if Depth of Field (DoF) is applied to the camera. None means no DoF is applied. When Manual is selected the DoF is controlled by Manual Focus Distance and F-number.

    • Manual Focus Distance - Specifies the distance at which objects are in focus.

  • Current Focal Length - Specifies the equivalent focal length of the camera lens in millimeters.


 

 

VRay Physical Camera Settings

 

 

  • 3ds max Compatible - Enables 3ds Max compatible exposure control.

  • Enable Exposure - Enables V-Ray exposure control. When enabled, the F-number, Shutter Speed ^-1, and Film Speed(ISO) settings will affect the image brightness.

  • Film Speed(ISO) - Determines the film power (i.e. sensitivity). Smaller values make the image darker, while larger values make it brighter.

  • Shutter Speed ^-1 - Specifies the shutter speed, in inverse seconds, for the still photographic camera. For example, shutter speed of 1/30 s corresponds to a value of 30 for this parameter.

  • F-number - Determines the width of the camera aperture and, indirectly, exposure. If the Enable Exposure option is checked, changing the F-number will affect the image brightness.

  • White Balance - Allows additional modification of the image output. Objects in the scene that have the specified color will appear white in the image. Note that only the color hue is taken into consideration; the brightness of the color is ignored.

 

 

 

 

 

Color Mapping


  • Reinhard Burn Value - Specifies the multiplier applied to bright colors.

 

Examples


Film Speed(ISO)

(Shutter Speed=25; F-number=1.4; White Balance= 1,1,1)

 


Film Speed(ISO) = 50

Film Speed(ISO) = 100

Film Speed(ISO) = 300




Shutter Speed ^-1

(Film Speed(ISO)=100; F-number=1.4; White Balance= 1,1,1)



Shutter Speed = 50

Shutter Speed = 100

Shutter Speed = 300




F-number

(Film Speed(ISO)=100; Shutter Speed=25; White Balance= 1,1,1)



F-number = 1.4

F-number = 4

F-number =8




White Balance

(Film Speed(ISO)=100; Shutter Speed=50; F-number =1.4)