(redshift) Motion blur suggested starting settings

[art3mis]

Can any Redshift users (or Mantra for that matter) suggest some good starting points for realistic motion blur?

You could easilly say "well whatever looks good" but there must be suggested settings assuming you are trying to match the look of a traditional film camera at 24fps.

 

Attached is the Parameters window. Way too many options...wish there was a 'default' button:)

Edited June 10, 2017 by art3mis

[Atom]

I would return Transformational Steps back to the default of 2, I think. Then play with Frame Duration. Drop it lower to get more blur. You must also enable the Deformation and Point Level blur check boxes. For some items coming out of DOPs you also must add ObjParms and enable Deformation Blur From Velocity Attributes.

The Shutter Start and Shutter End default settings create 0.5 gap between the values. This is where the default value for Frame Duration comes from. So the ROP is setup to mimic an ideal camera. When you lower or raise the frame duration without adjusting the Start/End you are entering into 'fantasy' or mograph style motion blur.

To remain true to the camera model simply make your objects move faster in the scene.

If you have a particular camera in mind that you are trying to emulate see if you can locate some data on the shutter speed and efficiency and try out the values in the provided fields.

Edited June 10, 2017 by Atom

[Guest tar]

1 hour ago, art3mis said:

You could easilly say "well whatever looks good" but there must be suggested settings assuming you are trying to match the look of a traditional film camera at 24fps.

Nope - there is no standard setting as the cinematographer can choose all the variables to make the shot come out. It is just one more tool to be creative.

[Howitzer99]

I just came across this, one of the better explanations on how motion blur is calculated.  It uses Redshift and Maya, but the principals of camera shutter calculations can be applied to any software and renderer.