[Andy]

Hi,

How would one apply motion blur to "only" the rotor of an animated helicopter, ie - not the whole helicopter?.
I can`t find anything in the manual except the camera properties options, the only problem is I can only apply motion blur to the whole object.
Any help would be really appreciated.

Thanks
Andy

[Mark]

Andy,

I'd be tempted to render the rotors of the helicopter in a separate pass and then composite them with the rest of the image.

In the main pass, set the scene as normal, and your rotors to 'unseen by camera'. Render.

Next, set all other objects in the scene to a solid black with a solid black background, and set the camera to the amount of blur you want to capture. Render.

Now, you should be able to composite the rotors over the rest of the scene and voila - motion blurred rotors - sharp scene.

Note that you'll need to save out the alpha information for the rotors in order to comp over the rest of the objects.

[Andy]

Hi Mark,

Thanks for the very detailed response, I will use this method and comp it all together.
Its been a while since I visited this site, I`m only now catching up on the VIP tutorials - I will purchase some more points again very soon.
I have to say this is a fantastic resourse for learning LW, the movie price is a giveaway, the instruction is first class and the forums are very helpful and friendly!.

Keep up the excellent work!.

Kind Regards
Andy

[Mark]

No problems, and thanks for the praise Andy...