Propellor motion blur - Urgent!

Become a member of the CGSociety

Connect, Share, and Learn with our Large Growing CG Art Community. It's Free!

THREAD CLOSED
 
Thread Tools Search this Thread Display Modes
Old 11 November 2006   #1
Propellor motion blur - Urgent!

Hey crew - I'm a bit stumped on this one. I know propellors are historically a pain in the arse, and now I see why. I've got a single blade propellor set up to spin at 6000 RPMS (physically correct, spins .25 of a degree each frame).

Setup:
Motion blur with no raytracing, Scanline: Rapid, Shutter: 0.5, Motion Steps: 15

It acts like it's not checking what's happening between frames to see the path it took. I would think spinning this fast with 180degree shutter it should be a big blurry circle, but there's hardly any blur, maybe 1/8th of a circle.

If anyone has any experience in this, I would greatly appreciate it.

~Scott
__________________

 
Old 11 November 2006   #2
hi scott

i had a same problem, in render globals - mental ray options in translation tab - performance - check export animation segments. thats all ( 15 motion blur steps is too high )
 
Old 11 November 2006   #3
Excellent tip! If I may ask, about how fast was your object spinning?
__________________

 
Old 11 November 2006   #4
as i remember i had a same spin, or something like that...
if image is too noisy - increase cotrast in motion blur tab....
 
Old 11 November 2006   #5
I'm sorry, what does a 'same spin' mean?
__________________

 
Old 11 November 2006   #6
Originally Posted by Scott212: .....spin at 6000 RPMS (physically correct, spins .25 of a degree each frame).
~Scott



I guess....
__________________

 
Old 11 November 2006   #7
Your probably right, I just didn't catch it cause of the wording.
__________________

 
Old 11 November 2006   #8
Hi,
Increase the number of propeller blades and animate their rotation with a mild lag compared to the orginal baldes.creates a illusion and might work ??!!
 
Old 11 November 2006   #9
unless it is something that really requires motion blur, why waste time rendering motion blur on propellers when you can just do it with a texture and save yourself the headache. Go into photoshop, make a propeller shape, put some radial blur on it. it'll give that blurred effect..put that same image as the alpha channel and now you'll have some blurred blades, just apply that texture to a circle shape....i know that doesn't address your motion blur question, but it could be a much easier solution to making propeller blades...but again, it all depends on what you're really trying to accomplish
__________________
Character Artist
Treyarch
My Website
 
Old 11 November 2006   #10
Thread automatically closed

This thread has been automatically closed as it remained inactive for 12 months. If you wish to continue the discussion, please create a new thread in the appropriate forum.
__________________
CGTalk Policy/Legalities
Note that as CGTalk Members, you agree to the terms and conditions of using this website.
 
Thread Closed share thread



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
CGSociety
Society of Digital Artists
www.cgsociety.org

Powered by vBulletin
Copyright 2000 - 2006,
Jelsoft Enterprises Ltd.
Minimize Ads
Forum Jump
Miscellaneous

All times are GMT. The time now is 08:48 PM.


Powered by vBulletin
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.