Re: Oh.. and rendering Ambient occ + motion blur..

[Sam Cuttriss <sam(at)janimation.com>]

"someone" should be very proud.

thats a great article, i personally dont enjoy post motionblur, especially when it comes to comping with depth of field etc.
its always upset me that the more blurred/ vague an object becomes the heavier it is to render.

it would be great if a technique like this could be applied as a global overridely to govern samples based on proximity to camera (view dependant) and speed.
i guess the same principles could be applied to glossy refections/refractions , geo approximation, ao etc etc.

it would be nice to have a global "samples manager" that all shaders etc could be relatively tied to rather than managing 10000 shaders that all repeat the same functionality.

_sam

Sam Cuttriss
Janimation 3D Aficionado

Guillaume Laforge wrote:

You could create an occlusion shader with a motion threshold to switch between a high and a low AO sampling.

Someone post an example here : http://www.xsi-blog.com/archives/119

:)

1/2

Guillaume


Alan Jones a écrit :

Be sure to use the rasterizer if you're trying something as
potentially intensive as ambocc with motionblur. Otherwise think
number of AO samples multiplied by number of motion blur samples
multiplied by number of pixel samples.... Ouch....

Cheers,

Alan.

On 6/28/07, Lee Hallett <Lee.hallett(at)bbc.co.uk> wrote:

Whilst I'm making noise on the list, is it just the way it is, or a
bug/issue with rendering anything with ambient occlusion and motion
blur? The rendertimes went into the decades when I had both activated
for a (comically assumed) quick job last week. With ambient occlusion
and no motion blur, frames were sub minute, add on a little motion blur,
and expect retirement to hit home before the render...

Surely this shouldn't be - also getting emormous memory requests from
mental ray (7 Gig for a very simple scene).

Has anyone else had problems with motion blurr and ambient occlusion?
Worked around it, bt it was a bit of a concern.

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