Re: Using hair for a wheat field

Date : Wed, 5 Apr 2006 16:08:41 -0700 (PDT)
To : XSI(at)Softimage.COM
From : Eric Lampi <ericlampi(at)yahoo.com>
Subject : Re: Using hair for a wheat field
*snicker*

Oh come on now Signore Sensitive Pants, you know I was just kidding.

Of COURSE it needs more cowbell, but didn't you know that cowbell is inversly proportional to the number of fans in a scene?

I saw a shirt the other day that said "Needs more Cowbell" on it.  I almost bought it, I want to wear it to client meetings.  I am such a dork.

E
 
Freelance 3-D Animator, F/X Artist

----- Original Message ----
From: brad <brad(at)cg-soup.com>
To: XSI(at)Softimage.COM
Sent: Wednesday, April 5, 2006 6:06:33 PM
Subject: Re: Using hair for a wheat field

As all effects artists know, Mr. Cranky Pixel, for each desired effect, there is only was to achieve it, and this one doesn't involve weight maps or gradients. I've attached an image revealing the key to what you need.


>  -------Original Message-------
>  I suppose I could scale them up and use 200 (sarcasm) fans instead, but the point was I didn't want to use fans because I had a particular idea in mind I would like to exhaust before I give up on it, I was having trouble getting the weightmaps/texture maps working with the hair.  I really appreciate the input though, but I eventually got it to work.
>  
>  This was my first shot at it, and it's fairly close.  In reality I wouldn't want them to bend quite so far, but it really illustrates the effect better.  
>  
>  I added a wind force, and I'm moving a gradient (with some of the gradient's turbulence added) in the FXtree through my texture map which is plugged into the hair's stiffness at .7, root stiffness 1, dampening .1.
>  
>  Eric
>  
>  Freelance 3-D Animator, F/X Artist
>  
>  ----- Original Message ----
>  From: brad <brad(at)cg-soup.com>
>  To: XSI(at)Softimage.COM
>  Sent: Wednesday, April 5, 2006 3:23:55 PM
>  Subject: Re: Using hair for a wheat field
>  
>  Scale them up!
>  
>  
>  >  -------Original Message-------
>  >  I think fans are a little too unweildy for the effect I am going for.  If I were doing a lawn, fans would do it.  On large, open fields, the wind is apparent as long undulating, uneven waves, which is what I am looking to simulate.  
>  >  
>  >  http://video.search.yahoo.com/video/view?&h=105&w=140&type=avi&rurl=www.mpjflynn.com%2Fwww2%2Fireland%2Fpictures%2FKinsale&vurl=http%3A%2F%2Fwww.mpjflynn.com%2Fwww2%2Fireland%2Fpictures%2FKinsale%2Fwheat%26wind.AVI&back=p%3Dwheat%2Bfield%252C%2Bwind%26ei%3DUTF-8%26fr%3DFP-tab-web-t%26cv%3Dg%26x%3Dwrt&turl=re2.mm-so.yimg.com%2Fimage%2F1847742151&name=%3Cb%3Ewheat+wind%3C%2Fb%3E.AVI&no=1&tt=54600&p=wheat+field%2C+wind&oid=590c41e095cf7a7e&size=3.7MB&dur=15>
>  >  
>  >  I need to do a large field like this, using 1000 animated fans is not an option, so my idea was to use and a wind force to bend them all in the same direction an animated greyscale texture map (for example) appied to the stiffness to attenuate just how much they are allowed to bend.
>  >  
>  >  I've tried to apply texture maps (like I would for particle rate for example), but they don't seem to effect the hairs at all on any of the available inputs under the hair PPG at all, they all look the same.  I am missing something simple?
>  >  
>  >  Eric
>  >  
>  >  Freelance 3-D Animator, F/X Artist
>  >  
>  >  ----- Original Message ----
>  >  From: Michael Wharton <michael(at)pureny.com>
>  >  To: XSI(at)Softimage.COM
>  >  Sent: Wednesday, April 5, 2006 11:12:16 AM
>  >  Subject: RE: Using hair for a wheat field
>  >  
>  >  Hey Eric
>  >  
>  >  We just did a weed/tall grass thing that looked really good.  We needed an
>  >  object to fall and flatten the grass out. Since it was a very localized
>  >  "force"   we actually ended up using just a shape animated lattice. worked
>  >  great.  For the soft breeze overall.. Based on how we liked the first
>  >  effect, we went with a larger lattice to simulate the wind...
>  >  
>  >  Hope it helps.
>  >  
>  >  Mike
>  >  
>  >  -----Original Message-----
>  >  From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] On Behalf Of
>  >  Eric Lampi
>  >  Sent: Wednesday, April 05, 2006 10:36 AM
>  >  To: XSI(at)Softimage.COM
>  >  Subject: Using hair for a wheat field
>  >  
>  >  Any idea how to make a wind blown field grass/wheat?  I haven't used hair
>  >  all that much, can anyone recommend any techniques?  I am not sure forces
>  >  would be the best way to go.  Anything that would let me use weightmaps or
>  >  luma maps?
>  >  
>  >  Thanks,
>  >  
>  >  Eric
>  >  
>  >  Freelance 3-D Animator, F/X Artist
>  >  
>  >  
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