Motion Blur on wheels - making the wheel shrink in size?

[matt_foxfuelled]

Hi Guys,

I've got this weird-looking effect going on when using 'Overrides>Camera>Motion Blur' where I have a car (camera behind the car as it travels forwards) and the motion blur seems to be making the wheel shrink in size. When I render without motion blur the wheel is 'there' but with motion blur on it's like the blur makes part of the 'solid' wheel disappear. Is this some kind of odd rotational blur effect going on? Does anyone know how I can correct this?

I cant post images due to the project its being used on.

Many Thanks,

Matt

[matt_foxfuelled]

Problem solved - Geometry samples too low.

[seandunderdale]

Have you tried different settings for your motion blur, in terms of the camera shutter speed or the wheel geo spin itself? Ive had in the past, if the settings resulted in a blur that was too fast, the wheel kind of dissolves, and looks smaller.

edit...you solved your own problem before I could post!

[matt_foxfuelled]

Yep! Silly me! I've been away from vray for a while doing other stuff and of course coming back to it, you just forget certain settings! Thanks for replying though!