The S-Files Episode 2: rendering particles with motion blur.

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SecondMan
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The S-Files Episode 2: rendering particles with motion blur.

#1

Post by SecondMan » Fri Jan 26, 2018 12:13 am

Hi S,


When using particles with motion blur, rendering gets very slow, very fast.

Am I doing it right by setting motion blur on on the pRender *and* on on the Renderer3D, with identical settings?

Thanks,
P.


Hi P,


Yes, that's the correct method.

Particles do have speed issues with motion blur, mainly because the initial render time is the main frame time, and then subsequent motion blur sub-times are around that time, which means that the first sub-time less than the main time causes the whole particle system to be re-generated up to that time.

The only way to change that is to use a centre bias of -1.0, so that all sub-times are after the main time (meaning the motion-blur all extends intothe future, rather than half in the past and half in the future).

S.

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Re: The S-Files Episode 2: rendering particles with motion blur.

#2

Post by theotheo » Fri Jan 26, 2018 4:04 am

Good tip PvH, didn't know about that one. I've been using the vector distort stuff to do motion blur on particles, which is also miles faster. (but sometime harder to get "right")

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Re: The S-Files Episode 2: rendering particles with motion blur.

#3

Post by SecondMan » Fri Jan 26, 2018 7:39 am

You're welcome. Feel free to add a description of your technique to the topic @theotheo :)