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Column width 62% The camera options control the way the scene geometry is projected onto the image, therefore changing how the render looks. These attributes override the following: Fancy Bullets type circle The type of camera used for rendering Auto Exposure Auto White Balance Enable Depth of Field Enable motion blur effects for the standard cameras in Maya UI Text Box type note If you use the VRayPhysicalCamera in your scene, the parameters in this section of the Render Settings are ignored. Exception applies for the overscan, motion blur parameters: prepass samples and geometry samplesOverscan, Geometry samples, Auto Exposure and Auto White Balance.       UI Path: ||Render Settings window|| > Overrides tab > Camera rollout  Column width 5%   Column width 33% Image RemovedImage Added

Camera Overrides Parameters

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The cameras in V-Ray generally define the rays that are cast into the scene, which essentially is how the scene is then projected onto the viewing screen. V-Ray supports several camera types described below with sample renders in the next section.

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Column width 20%45%   Panel   titleBGColor  columnwidth30% transparent borderStyle none title Image Removed Common parameters for Standard, Spherical, Box, Warped spherical, Cylindrical (point), Pinhole, and Cube Camera Types Image Added Image Removed Camera parameters for Fish eye Camera Type Column width 30% 10% Column width 20% 45% Panel titleBGColor transparent borderStyle none title Fish eye Camera Type Image Added

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columnwidth30% Column 20% width 45% Panel   titleBGColor transparent borderStyle none Image Removed title Camera parameters for Cylindrical (ortho) Camera Type Image Added Column width 30% 10% Column width 45% Image Removed Camera parameters for Panel titleBGColor transparent borderStyle none title Spherical panorama Camera Type Column width 20% Image Added

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The images below show the difference between the different camera types used in rendering:

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Example: Camera Types Explained

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This example shows how the rays for different camera types are generated. The red arcs in the diagrams correspond to the FOV angles.

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Motion Blur Parameters

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This example demonstrates how motion blur works.

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Example: Duration

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The following scene consists of three-frame animation of a moving cube. The cube's position on each frame: 

Frame 0: Left side
Frame 1: Near box
Frame 2: Right side

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The following images show frame 1 rendered with different duration values:

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Column width 20%   Column width 30% Duration 0.5 (frames) Column width 30% Duration 2.0 (frames) Column width 20%

 

 

Anchor
intervalCenter intervalCenter

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Example: Interval Center

 

This example demonstrates the effect of the interval center parameter. The scene is a moving sphere. Here are three sequential frames without motion blur: 

 

Here is the middle frame, rendered with motion blur and three different values for the interval center; the motion blur duration is one frame.

 

Interval center = 0.0; the middle of the motion blur interval matches the sphere position at the second frame

 

Interval center = 0.5; the middle of the interval is halfway between the second and the third frame

Interval center = 1.0; the middle of the interval matches the sphere position at the third frame

Interval center = 4; the middle of the interval matches the sphere position at the sixth frame

 

Interval center = 8; the middle of the interval matches the sphere position at the twelfth frame

 

 

Anchor
geometrySamples geometrySamples

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Example: Geometry Samples

 

The following images demonstrate the Geometry samples parameter using the scene from the Duration example. In all the following renderings, the  Duration (frames)  parameter is set to 2. All other parameters are the same as for the previous images. The higher the value for Geometry samples, the more accurate the estimated object motion. However, excessive increase of this value will result in long rendering times.

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Column width 20% Column width 30% Geometry samples = 2 Column width 30% Geometry samples = 8   Column width 20%

 

The geometry samples parameter is useful when creating motion blur for complex motions, for example, fast-rotating objects. Here is an example with an accelerating airplane propeller with a blue and yellow pattern:

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Column width 25% Geometry samples = 2 Column width 25% Geometry samples = 3 Column width 25% Geometry samples = 6 Column width 25% Geometry samples = 10

 

Notes

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The number of geometry samples can be controlled on a per-object basis on the Object Properties dialog. This is useful if you need a lot of samples for some objects in the scene (for example, the wheels of a moving car) while other objects can do with fewer samples (such as the car body). Using more samples only where needed saves memory and speeds rendering.

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