Motion blur in single image with moving camera blurs the wrong objects (SuperFly)
The setup: I put a person in a car on a street and want to have the street blurred and my driver (and car) in focus. I parent my main camera to the person, parent the person to the car and move the car from frame 1 to frame 30. Looks awful nice in the animation preview.
But when I create a raytrace preview my car and driver are blurred instead of the road! This also happens when I use the dolly camera instead or when I don't parent the camera but move it with the car by changing the X value from frame 1 to 30. All looks fine in the animation play and frame single steps, but the render keeps blurring the moving objects, although the camera is moving along with them. I also tried rendering frame 29, in case frame 30 is somehow blurred in between frames 30 and 1 - same effect.
I finally gave up, fixed driver, car and camera in position and let the road and background move. Voilà: perfect motion blur just like I want it.
But what did I do wrong? Can it be that motion blur always blurs moving objects, regardless of the camera movement?
@oldenburg Ooh that's an interesting conundrum. Given the complexity of calculating a moving camera's position relative to other moving objects, even if parented, I would not be at all surprised if the answer to your final question was yes, although that would make large scale motion through terrains (something I guess Poser is not really designed for) problematic. It would interesting to import the original animation into 3DS Max and see how that handles motion blur in that situation.
This post is deleted!
@oldenburg You're right. That sucks. Sometimes it would be easier than having to move the terrain all the time. In this set-up Firefly does the motion blur just fine. Most weird.
@oldenburg I would report that as a bug. I also wonder if this same thing happens in Blender.