Wrinkle A Piece Of Paper

[fredriklar]

Hi,
I have to animate a piece of paper, ordinary printing paper quality. Teh paper is supposed to wrinkle down to a crumpled paperball, all done in 25 frames but the result must be very natural.
Anyone that have done this before or have an idea?

/Fredrik

[jjdon]

I'm a newbie/interested reader - can't solve this. That's tough, to me. A seemingly simple thing that isn't so simple afterall. Me, I wouldn't think paper so much as lines of force. Just wanted to say, though - man, that's tough - it's made me think......

[fortner_mike]

if you're good at dynamics than you could work it out, otherwise make a nurbs or subdivision plane with sharp edges and move vertexes.

[ptb]

Here's a possibility:

convert the paper (low res (!) poly-plane) to a soft body. create springs (use max distance to avoid too many connections!), change stiffness to about 50, then add a turbulence field with 0 attenuation and magnitude of maybe 50. Looks like wrinkled paper, but not absolutely natural because it intersects ... anyway, it may help. if you want absolute control you got to model every step and create blendshapes in combination with other deformers.

[bjohnston]

I might use Ncloth in 8.5, and a radial feild set to a negative value (-30 no attenuation) that encompasses the paper object (polymesh), this will crumplie the paper. Then, I might extract the beginning and ending shapes (or any frame that you like) and create a couple blend shapes, then animate the blendshape. This will keep the paper animation kind of rigid like paper, and not like cloth.