mr - turn off camera motionblur

[redforty]

Oh Dude, I had the same issue about a year ago. In a nutshell, no. There is no way to separate the blur from camera movement and object movement.

But I found a work-around. At least, in my situation:

I wanted time to stop in the middle of a car crash and have the camera move through the scene. I wanted all the motionblur from the objects to be there (3d deformation a la MR) to give it a ghostly, ethereal feal.

What I did, was to create 2 keyframes for every object moving in that instant (like on frame 100 and 101). Then, after deleting all the other keyframes, I had the graph editor cycle the keys pre and post infiniti. I moved the keys to a fraction (like 100.5 and 101.5), so that you never see the animation "resetting".

Then I just flew the camera around at my leisure and got the result I wanted (without worrying about rendering at 100x number of frames).

Now, if I wanted the scene to not completely freeze, but to go "bullet time", I think I could possibly do some number crunching to figure out spreading the key frames enough at a certain fraction and cycling with an offset to get that result. Maybe.
I don't know. My head hurts just thinking about it.

[bgawboy]

The way to do it if you could use standalone would be to take the motion transform off the camera instance. I wonder if there's a way to do that hidden in the UI for the camera shape node or something similar.

BTW, here's an important performance tip for those using camera motion with raytracing. Turn off the regular scanline mode. Use raytracing for the primary ray, if not interested in using the rasterizer.

[shine77]

The way to do it if you could use standalone would be to take the motion transform off the camera instance. I wonder if there's a way to do that hidden in the UI for the camera shape node or something similar.

BTW, here's an important performance tip for those using camera motion with raytracing. Turn off the regular scanline mode. Use raytracing for the primary ray, if not interested in using the rasterizer.

Have you tried selecting the mr globals in outliner and go under extra attributes and uncheck Export Motion Camera.

[Tocy]

Hi, thank you very much for all the replies:

redforty: that could have been a hard problem! I will check your solution out, thanks.

bart: yes I would like to have something like this, I heard/read somewhere it could be done in standalone - wasn't sure it exist in maya. We will definitely check your tip out with raytracing the eyerays as well, I didn't know it could accelerate this kind of scenes. I assume it requires a well defined BSP.

Shine77: I tried this option, thanks, but actually it extends the length of motion blur. Strange, from its name, this parameter could have been the one I was looking for.

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