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Sheep

Posted: Tue Feb 09, 2010 8:21 am
by superrune
I've been trying to create realistic fur for a sheep, and getting it to simulate believably, and these are my results so far.

There are some shadow artifacts on the simulation test, and the fur feels a tad light, but these are works in progress :)

Re: Sheep

Posted: Tue Feb 09, 2010 8:26 am
by 3DTutorial
Beautiful work! Simply awesome.

Joe

Re: Sheep

Posted: Tue Feb 09, 2010 11:05 pm
by Bigguns
WOW Awesome!! Can't wait to see more :P

Re: Sheep

Posted: Wed Feb 10, 2010 1:44 am
by anishmations
Superbb!! :ok:

Re: Sheep

Posted: Wed Feb 10, 2010 3:15 am
by moontan
Great job. Love the animation. So lifelike....the hair that is. This ought to inspire a lot of frustrated hair and fur users.

Re: Sheep

Posted: Wed Feb 10, 2010 8:35 am
by Infinite
Holy Cow! or should I say Holy Sheep!

I think you just blew my mind! stunning work! :ok:

EDIT

How did you do the lighting? what are your settings, very natural. It looks like there is some GI bounce in there?

Re: Sheep

Posted: Wed Feb 10, 2010 10:47 am
by superrune
Thanks everyone :)

Lee: No GI, even though I wish I had. It's a basic three point setup, with a carefully colored spot coming from below.

Re: Sheep

Posted: Wed Feb 10, 2010 12:52 pm
by Infinite
superrune wrote:Thanks everyone :)

Lee: No GI, even though I wish I had. It's a basic three point setup, with a carefully colored spot coming from below.
Sweet trick! well it works great! :D

Re: Sheep

Posted: Fri Feb 12, 2010 9:25 am
by superrune
Here's an updated render of the simulation. The fur is a lot thicker now, and I love the weighty feel of this sim. It took some days to render though, V-Ray kept crashing on me (usually at night, when I wasn't looking!). I'm switching over to Brazil for the next version.
100212_sheep_simtest.mov
(3.9 MiB) Downloaded 27151 times
I'm having some jittery simulations on parts of the sheep. You can see it around the ear at the end. Cem, any suggestions to settings I could tweak to remove them? Here's a screengrab of the Sim-modifier:
simsettings.jpg
simsettings.jpg (149.9 KiB) Viewed 30745 times

Re: Sheep

Posted: Fri Feb 12, 2010 9:37 am
by cem
superrune wrote:I'm having some jittery simulations on parts of the sheep. You can see it around the ear at the end. Cem, any suggestions to settings I could tweak to remove them?
It seems like a collision problem. It appears that the ears are intersecting with your hair mesh volume. Try to avoid that.

Also, you don't really need collisions with the root object for this model. Turning it off might significantly improve simulation time and should get rid of that jittery motion around ears.

Re: Sheep

Posted: Fri Feb 12, 2010 10:38 am
by superrune
Thanks Cem, I will try that. The first version actually had no collisions, but still was jittery in places (you see it around the ears when the sheep is upside down). I will look at the mesh, and see if I can fix it.

Re: Sheep

Posted: Fri Feb 12, 2010 12:03 pm
by superrune
I noticed the hair mesh has a fair deal of self-intersections, will that affect simulation?

Re: Sheep

Posted: Fri Feb 12, 2010 12:12 pm
by cem
Self intersection of hair mesh is not such a big deal. It would affect the behavior of hair-hair interactions in the sense that hair-hair interactions wouldn't try to resolve self-intersections, if they exist in the un-simulated hair mesh.

Intersections of the hair mesh will colliding object, on the other hand, is a whole other ball game.

Re: Sheep

Posted: Fri Feb 12, 2010 12:18 pm
by superrune
It seems like I have to turn self-collisions back on. When he's on his back, the fur starts interpenetrating his tummy. Or perhaps I should create some simple collision objects instead...

Re: Sheep

Posted: Fri Feb 12, 2010 12:23 pm
by cem
Creating simple collision objects is always a good idea.

By the way, you can improve the collisions by increasing the "subdiv" parameter. It would make the collision computation slower, but more accurate.

Re: Sheep

Posted: Fri Feb 12, 2010 12:37 pm
by superrune
Great - will try that too.