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Strange polygon jittering/flashing SOFT BODY
Hi,
The objective I have is to fill a room with paper.
I am using an emitter to create planes with softbody tag attached which works fine except that I am having some issues with flickering polygons and jittering movement once it fills up a bit.Any insight as to how to clean this up a bit would be greatly appreciated
link to a gif showing the issue
https://imgur.com/Fd4zAbRLink to video showing the issue in full (specifically the base of the room)
https://youtu.be/kaPagS_xI7USome contents or functionalities here are not available due to your cookie preferences!This happens because the functionality/content marked as “Google Youtube” uses cookies that you choosed to keep disabled. In order to view this content or use this functionality, please enable cookies: click here to open your cookie preferences.
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6 Replies
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hard to tell with the full length vid with all the artifacting from compression but it’s clear enough in the gif. I would guess it’s the kind of motion you get from softbodies when they interpentrate and explode but it’s really restrained. You’d have to try and remove some energy from the collisions would be my guess but what’s happening with the one piece of paper, close to the top near the end of the second run in the gif, that just appears for one frame the disappears entirely is something else. All of it’s pretty touchy when trying to pile objects particularly with soft bodies, it would help to have the scene to play with for tweaking values.
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Hi Brian,
thank you for taking the time to assist.
Here is the project file if you want to fiddle with it.
I feel like I have tried every possible configuration of edits on the springs of the soft body with no real luck yet. I will try crank up the damping on all parameters as well and see what happens!https://www.dropbox.com/s/ihjs530qgvw8w82/PaperVideo.zip?dl=0
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is it possible that my render resolution has something to do with it?
I am rendering at 360×640 for the sake of getting faster results -
I don’t think it’s the resolution, here’s a test I ran. Shortened to 100 frames, with aspect ratio changed so I can watch the bottom of the box, removed collision noise in the box colliders (major problem in any long anim with lots of objects) and cranked the stiffness and damping in Structural and Flexion. It’s a lot more stable in the pile with those settings, though I’m only going to 100 frames to be quicker but it still makes a major difference from the original settings over that same range of frames.
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That is great thank you!
I don’t think I was pushing those values far enough, they seem a bit arbitrary.The only thing that isnt quite working right is the downward compression now, I am going to fiddle around with mass and density to see if it helps but not sure that is something we can get rid of
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Push the Structural value up higher, I was primarily interested in Flexion since that is the stiffness that seemed most likely to be the problem. Check out the help for more info. And yes the values are what they are, not necessarily ‘real’ but it is a simulation.
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