The effects of these properties are not visible when rendering with the Viewport Render Region. Mplay or Render View (not set to scene view) must be used instead.

 

These parameters are used to override or add motion blur properties on a per camera basis.

Transform Keys

Can be used to override the number of ROP Transform Keys for the camera motion.

In the example below, note that the sphere is stationary. Only the camera is moving.

Camera Transform Keys 2 (rollover image).

Camera Transform Keys 4 (rollover image).

Camera Transform Keys 8 (rollover image).

 

See Arnold ROP: Motion Blur for more details

Camera Shutter

Allows the camera to use shutter chosen in the current ROP or can have a camera-specific shutter.

See Arnold ROP: Motion Blur for more details.

Instantaneous Shutter for Motion Vectors

The instantaneous shutter toggle will set a zero-length shutter at the plain frame position. Alternatively, you can set a zero-shutter using a custom camera shutter.

To generate motion vectors, set an instantaneous shutter on the camera.

 

Shutter Filter

The filtering applied to time samples. By default, this is a box filter, with all time samples having the same weight. A triangle (or "tent") filter is also available which produces smoother trails.

Arnold supports custom shutter shapes with the shutter curve camera parameter. You can define as many points as required. Coordinates increase from 0 (corresponding to the shutter_start) to 1 (corresponding to the shutter_end). Values in the vertical axis must be non-negative, and it is not recommended to enter values above 1. The values are linearly interpolated between each point. In the examples below, you can see the effect different curve shapes have on the motion blur trail of a sphere that has been key-framed moving from left to right.

Various custom camera shutter curve shapes

Rolling Shutter

Rolling Shutter is used to simulate the type of rolling shutter effect seen in footage shot with digital cameras that use CMOS-based sensors such as Blackmagics, Alexas, REDs, and even iPhones. This method is implemented by rolling (moving) the shutter across the camera area instead of the entire image area all at the same time. 

Without rolling shutter (rollover image).

With rolling shutter (rollover image).

 

The Rolling Shutter direction specifies the direction that the rolling shutter takes place. The default is 'off'' and can be set to 'top' (top to bottom being the most common scanning direction), 'bottom', 'left' or 'right'. 

 

Interesting effects can be achieved when combining motion blur 'length' with rolling shutter:

Motion blur 'length' from 0 to 2

 

 

 

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