Animate rendering of Vector pass

Support Animation and Rigging
1

Hello,

I am wondering if it is possible (or even makes sense) to animate the rendering of the vector pass (see screenshot).

del.jpg284×523 14.7 KB

When I press “i” while over the checkbox, the error message “Could not insert keyframe, as RNA Path is invalid for the fiven ID (ID = SCScene, Path = use_pass_vector)” occurs

I read through http://aligorith.blogspot.com/2010/12/animating-in-25-getting-to-grips-with.html but could not find a solution.

The reason why I want to do this is because I have an animation with thousands of frames and most of the times only tiny movements are done - for this, I do not want to render the vector pass (which I use for motion blur) because this would save some time.

But for a few frames - where objects move quickly - I want to render the vector pass in order to do a motion blur (but maybe even if I should be able to animate the render pass I might have problems with the compositor, where I connect the Speed with a Vector Blur - this somehow would then need some animation, too (I guess))


Anyway, any comments are appreciated.

2

If you’re rendering an image sequence (which you should be anyway), you can render the without-movement frames without the speed pass. Then turn on the speed pass, and render only the stretches of frames that need blur. For correct blur calculations make sure to include a few frames before and after the movement.