Re: help with motionblur optimizations - alternatives?

[Francois Lord <francoislord(at)gmail.com>]

This is a classic case for Rasterizer (if you did want to use 3d motion 
blur absolutely...).
The scene you describe seems to be very intensive on sampling: ambiant 
occlusion uses many samples per pixel and so do area lights. Rasterizer 
shows its strength in such scenes because it calculates the sampling 
only once per frame.
Try with settings like Shading Samples: 0.1, Pixels Samples: 1 Motion 
Samples: 1 just to see if you scenes looks the same with rasterizer. It 
should give you a rough preview. Then try with higher values for Shading 
Samples (1.0 - 6.0. The more details the textures have, the higher this 
value will have to be) and for Pixels Samples (3 - 10. This is the 
equivalent of the anti-aliasing).

And of course, don't forget to tweek the BSP. It's always important for 
motion blur scenes.

Cheers.

Tim Leydecker wrote:
> ---I´m sorry if you get this twice, I had used a wrong
> email adress to submit, got a bounce reply, not sure it
> showed up anyway ----------------------------------
>
> Hi guys,
>
> I´m running into problems in tuning the speed of
> motionblur calculations. I suspect I do something wrong.
>
> I have a scene, 650 000 tris, xsi_ambientocclusion
> piped into the ambient slot plus one pretty large and
> highly sampled arealight. Renders at roughly 1min10
> with reasonable AA (Box -1/2, 0,075 threshhold).
> (768x432px)
>
> If I activate motionblur, shutter close at 0,5 and set
> Evaluate SRT for entire frame, Deformationblur to on,
> treshhold to 0,1 and keep the steps at 1, I get a rough
> 12min per frame. Quality is decent, no problems with that.
>
> Unfortunately, I won´t be able to use 3D motionblur with
> such a speedpenalty, because I can´t throw more machines
> at it to speed up turnaround but would have to bring pass
> time down to max. 3min/frame or 10min for all (~5) passes.
> I simply don´t have the time+budget to up any of that.
>
> So, I´m desperately looking for alternatives, any tips
> you´d bewilling to share? Stuff I could read up on?
>
> Cheers
>
> tim
>
> ---
> Unsubscribe? Mail Majordomo(at)Softimage.COM with the following text in 
> body:
> unsubscribe xsi

---
Unsubscribe? Mail Majordomo(at)Softimage.COM with the following text in body:
unsubscribe xsi