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View Full Version : How do you get a sphere to look as good as this with fracture?



Peter Ekberg
04-16-2013, 02:59 AM
Look at 4:50 in this vid http://www.youtube.com/watch?v=P8XqSv3hRPA

how is this done? when I use fracture Im not able to get a smooth nice sphere..

Would someone please be so kind to explain the steps :)

BR Peter

djwaterman
04-16-2013, 04:37 AM
https://vimeo.com/59067339

I don't know if this will help, because I rendered these to show the wires so you can see the pre-fracture in the wires, but they weren't visible before using the shader and there was a switch in the bullet UI that seemed to keep the object from showing any cracks but I can't look at it right now to see what it was. However, probably the surest method would be to swap out the object with an un -fractured one and cut between them.

cagey5
04-16-2013, 05:10 AM
It's really a matter of resolution. In the pictures attached the ball on the left is the default sphere settings of 24 x 12. The sphere on the right is 96 x 48. Smoothing is set the same for both objects.

Peter Ekberg
04-16-2013, 05:29 AM
Awesome looking but if you do this to say with glass balls? how would you solve fractures and smooth surface?

Peter Ekberg
04-16-2013, 05:33 AM
so both objects in the image to left is fractured right.
the sphere to the right looks good but how would you solve a glass material?

cagey5
04-16-2013, 05:56 AM
Either switch objects at point of impact or keep internal surfaces at 100% transparency until point of impact might work.

[EDIT] I seem to recall that the dielectric node could be useful in such cases, though I think cast shadows would always be a problem.

hrgiger
04-16-2013, 06:27 AM
I think the switch is the only way to solve a transparent object.