# siRenderShutterType Enum

## Enumerations
enum | siRenderShutterType { siRenderShutterCenterOnFrame = 0, siRenderShutterEndOnFrame = 1, siRenderShutterStartOnFrame = 2 }

## Detailed Description

Controls when the camera's shutter opens and closes when generating motion blur for render.

See also:
  ShutterType context attribute (Process callback), Custom Renderers

## Enumeration Type Documentation

enum siRenderShutterType

Enumerator:

  siRenderShutterCenterOnFrame | [0] The mid-point of the shutter open period is centered on the frame being rendered, with the open and close shutter equally distant on either side of the frame.
  siRenderShutterEndOnFrame | [1] The shutter should close on the current frame, and open at "shutter speed" frames before the current frame.
  siRenderShutterStartOnFrame | [2] The shutter should open on the current frame, and close at "shutter speed" frames past the current frame.