Fast motion blur in mr?

[uncle_bilbo]

Hi, a tough question.. still, a major issue, because motion blur is so essential for production, yet unbelivebly slow by default..

Thanx in advance.

[subsamples]

Check out the flag -scanline rapid. There doen't apear to be a way to set it in the gui but the flag can be passed with the render command. It is much faster then the standard blur. Here is the doc page on my machine

http://localhost:4444/Maya5.0/en\_US/MRmanu...ne\_Options.html

[misha123]

Is it possible to activate this mysterious "rapid" mode with the mayarender_with_mr command? It seems like the flag "-scanline rapid" can be invoked only with the ray command for which the standalone version of mentalray is required.

Any suggestions?

[misha123]

There is a plugin for AE & Combustion called "ReelSmart Motion Blur". The current version is able to create a motion blur effect based on motion vectors provided by mentalray by using a special shader.

Information about the plugin and the mentalray shader is available here: http://revisionfx.com/mblur.htmhttp://revisionfx.com/mblur.htm

I didn't test the demo, so I don't know how good it really works, but the screenshots look promising.

[aaron_johnson]

do you know if this shader for mr that gives motion vectors will enable the images to be used in the blur2d utility that comes with maya...?? this would be really good for matching blurred MR passes with 2d blurred maya software renders. currently there's no way i know of to do this.....

i will check out the shader but it would be good if there was a way to have the information in the file (like maya does it) rather than changing the rgb values.

[pierrejasmin]

There is currently no compositing app that allows you to extract the Motion Vectors off the IFF files or a Maya or otherwise utility to extract it . Would be cool if you could in a single pass just say output motion vectors and it would generate another image sequence with coverage in the alpha channel...

Pierre
www.revisionfx.com