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Is this possible to achieve with 3d Flag?

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Carlos Angulo
Is this possible to achieve with 3d Flag?
on Jan 11, 2006 at 3:04:30 am

Hi, I would really appreciate if this kind of banner is possible to be done with 3d Flag, I


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Jon Okerstrom
Re: Is this possible to achieve with 3d Flag?
on Jan 11, 2006 at 4:42:37 am

Hi Carlos,

I took a quick look at your movie... essentially looks like crime scene tape and it should be no problem for Flag.

I would recommend the following:

Size from height/width to control the shape.
Lock left and right edges/all edge points.
Use very little gravity .. something like .2
Use a very low wind speed.. start with something like a constant .2
Adjust wind direction angle and elevation to taste.

In the options window, try flag weight 1, conform 2 and air friction 5. all other options 0.

This should give you basic tape with very little movement or stretching and a slow rippling in the surface. Tweak it some more and you should have it.

Hope this helps.

Jon




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Matt Rhodes
Re: Is this possible to achieve with 3d Flag?
on Jan 11, 2006 at 9:03:34 pm

Hi Carlos.

I did a quick test and I think the results came out pretty well:
http://www.motivatedpixels.com/banner_3d_flag.mov
(1.6 Megs -- I'll keep the file around for a few days)

The tips I'd give are:
- Make a Comp (or image) for your banner -- mine was 1500x100 pixels
- I set Gravity to 1 and the Wind Speed to 3. I also pointed the wind right at the banners (Angle: 0 Elev: -10)
- For the flag parameters, I set the Bend and Shear values to 0 so that it didn't bounce around too much
- I set the Horizontal Mesh to 18 and Vertical Mesh to 26 so that the folds would be horizontal
- In order to make sure there wasn't too much bounce, I set Conform to 100
- I faked the blur and added some other movement fakery to get it to match

Note that this was a quick test, so I didn't spend too much time trying to match up the look, lighting, or motion.

Let me know if you have any questions.

Matt Rhodes
Zaxwerks, Inc.



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Jon Okerstrom
Re: Is this possible to achieve with 3d Flag?
on Jan 12, 2006 at 1:11:54 am

Hi Matt,

Nicely done!

My test looks pretty similar, but your cloth looks tighter. ... I'm guessing the much higher conform number and wind direction played roles in that.

Did you render one banner movie and composite copies offset by time and location, or actually render three instances of flag at once, or something else?

Jon





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Matt Rhodes
Re: Is this possible to achieve with 3d Flag?
on Jan 12, 2006 at 1:45:30 am

Hi Jon.

Yes, a high Conform number helps a lot. The higher the Conform, the more times it tries to "be a perfect piece of cloth" per frame. It slows things down a little bit, but the end result is that the cloth looks tighter.

A judicious choice of Mesh values helps a lot too.

As for the wind, I found that if blew it right at the banner, it stayed more taught.

The 3 banners were 3 layers. I copied my first layer 2 times and then changed some keyframes.

Note: A trick I used was that most of the movement on screen was through the camera.
If I moved the flagpoles too much, the cloth would bounce around too much.

This is a good plug-in to experiment with.

Matt Rhodes
Zaxwerks, Inc.


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Jon Okerstrom
Re: Is this possible to achieve with 3d Flag?
on Jan 12, 2006 at 3:09:00 am

Thanks for the info, Matt.

I agree on your "move the camera rather than the object" theory. I do that with Invigorator sometimes too.

Jon



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Serge
Re: Is this possible to achieve with 3d Flag?
on Jan 13, 2006 at 5:31:31 am

Ah! Finally a Genious coder but also a creative artist. I love that!

Serge


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