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 Animated mud - help required
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Ewen Milne
Infrequent Poster

United Kingdom
13 Posts

Posted - 09/16/2008 :  05:08:59  Show Profile  Visit Ewen Milne's Homepage
Hey guys,

Can anyone give me a good solution for animating mud? ... and to make it even more challenging, animated mud which will render nicely using the 'Toon' rendering method?

To put my question in to context, I'm preparing an offshore animation which must show mud being pumped through a drilling pipe. At one point in the animation the mud will spill out of an air gap and on to a floor.

Any help, comments or suggestions would be appreciated.


Ewen

StrataTutorials
Infrequent Poster

Belgium
34 Posts

Posted - 09/16/2008 :  11:49:00  Show Profile  Visit StrataTutorials's Homepage
You can do this with the Fountain-fx:
Choose Metaball, and not spheres, so you get that muddy-look.
Also make the object(s) tubes and floor, where the fountain will spill on, a colision object in the project window.

Lucas
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tbgriswold
Regularly Educational

USA
1450 Posts

Posted - 09/16/2008 :  12:15:30  Show Profile  Visit tbgriswold's Homepage
Lucas is correct. This is the only good way to do this. It does not produce a good "pile" however. You might have to fake that with a second object pushed up through the floor. Also I did not have much luck using the Toon render. It ran out of memory, so you may have a problem if you get too many metaballs going.

Here are some settings I used:


I made a second fountain and a second set of settings to vary the mud shapes a bit more.

Britt

Edited by - tbgriswold on 09/16/2008 12:18:35
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Ewen Milne
Infrequent Poster

United Kingdom
13 Posts

Posted - 09/17/2008 :  05:34:51  Show Profile  Visit Ewen Milne's Homepage
Lucas/Britt,
That's fantastic, works a treat, and with the toon rendering it looks quite authentic. Did crash my machine first time I rendered it, however after a few adjustments to the settings, it has worked without problem.
Thank you very much for your help.

Ewen Milne
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tbgriswold
Regularly Educational

USA
1450 Posts

Posted - 09/17/2008 :  10:40:55  Show Profile  Visit tbgriswold's Homepage
I have made a movie of my mud flow. It uses a 4 image blur on the camera and took ridiculously long to render, but here it is. If you have any movies of your toon mud flow, I would love to see it.
http://www.stratacafe.com/gallery/britt_griswold/81509172008103619.mov

Britt


Edited by - tbgriswold on 09/17/2008 11:00:31
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Ewen Milne
Infrequent Poster

United Kingdom
13 Posts

Posted - 09/17/2008 :  10:55:02  Show Profile  Visit Ewen Milne's Homepage
That's great. The 4 image blur is a very neat touch. I'd like to incorporate that. Rendering time is no object - I used to work on an old G3 and occasionally I left it rendering for 2-3 days for a 768x576, 10 second scene! Aaaah, halcion days! (I'm now privileged to be on a souped up G5 now)

I only did a very small test rendering, but I promise to let you see the final flow of mud once it is in situ and my scene is finalised.
Thanks again, Britt.

Ewen Milne
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Ewen Milne
Infrequent Poster

United Kingdom
13 Posts

Posted - 09/25/2008 :  14:54:48  Show Profile  Visit Ewen Milne's Homepage
Hi Britt,

I'm wondering if you could help me again. I am rendering my mud scene, but I am getting a strange effect when the mud is rendered as an animation. The mud looks like it is split down the middle of the flow. I have put an example online, which you can view via the following link:

http://www.ewenmilne.co.uk/mud-pump-test.mpg

Do you have any explanation why the fountain mud effect could be doing this?

To explain a bit further, the fountain is contained within a tubular shape which is a 'Make Construction' object and also a 'Collision object', however there are no obstacles in the tube which should obstruct the flow.

Thanks again for your time.

Ewen Milne
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tbgriswold
Regularly Educational

USA
1450 Posts

Posted - 09/25/2008 :  17:58:49  Show Profile  Visit tbgriswold's Homepage
That does seem to be rendering oddly. I do not have an explanation. Ar you using any antimatter shapes to do the cutaway of the tool? Antimatter might be cutting it in half...

Do you get the same effect with a non-toon render?

Britt
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Brian Lawson
A Fountain of Information

USA
5217 Posts

Posted - 09/25/2008 :  18:12:38  Show Profile  Visit Brian Lawson's Homepage  Send Brian Lawson an AOL message
Did you use two Fountains the way Britt did with his example? That could explain why you are seeing the separation.

Brian Lawson
Strata Technical Support
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Ewen Milne
Infrequent Poster

United Kingdom
13 Posts

Posted - 09/26/2008 :  03:38:03  Show Profile  Visit Ewen Milne's Homepage
Thanks guys, I only used one fountain, but I will try it again with two.

There are no antimatter shapes involved.

Thanks again for your help, I'll let you know how I get on with two fountains.


Ewen Milne
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