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Software Discussion
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3D Studio Max
Weird noise problem with object deformation
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Gotmilk 228 posts19 Apr 2006Hi there. I tried tysons tutorial with teapot deformation and it worked great. No problems
But now i tried the same setups with another scene. I want a car body to get some deformations. I used the car as i used the teapot. Only one single mesh added reactor cloth to it. Then i created reactor plane. Then i created the animation. The car body falls on the reactor plane and it goes nuts. I hoped it would crush like a cloth but for some unknown reason i get ugly noise. I added some screens too so u could see what am i talking about. I have to get this right because its a part of my project.
Please help me if u know what i am doing wrong
cheers.
everything is fine yet
but the problem starts here
and 20 frames later it goes completely nuts anf freezing my computer
i am not sure what i am doing wrong.. -
19 Apr 2006Collision tolerance is too high
Might want to turn your key substeps up too. Try 100 instead of 10. -
Gotmilk 228 posts19 Apr 2006erm.... where can i change the collision tolerance. Is it in the cloth reactor menu???
i am also unable to find substeps option too. There are tons of sliders
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g3org3 355 posts19 Apr 2006I don't have max open right now but I believe it is in the reactor part of the utilities tab.(its the last tab of , objects, modify, heirachy, etc.) It is under Preview/animation I believe, and the collision is in 'World' -
Gotmilk 228 posts20 Apr 2006what does the key substeps do??? It makes making animation generation longer but i dont see any visual difference.
About that collision i lowered the number value and nothing changes. I tried the same with the teapot and i saw the collision difference but if i try with my car the collision is still weird. Maybe its got something to do with the car model mesh. -
20 Apr 2006on a side note...
did you build the DeLorean?
its looking pretty good, if so! -
20 Apr 2006boost that to at least 20 or 30 you can also try a 100 like tyson said, make shure you have a rubix cube next to you though.
ps: i would advise you unsmoth the mesh before doing anything... smooth it after your reactor calculations
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Gotmilk 228 posts20 Apr 2006to Hype.
sadly this delorean is not built by me. I downloaded it from turbosquid.com
I am not wery good at cars (or any other moddeling) but i do make progress.
To Richard i tried to boost it up but it still gives the same problem. only animation calculation is alot longer. What does the substeps do????
I even removed meshsmooth and any other thingy but no help there.
Oh well i am so tired i will go sleep now. Maybe tommorow with my fresh head i will find solution or workaround. -
20 Apr 2006substeps, i believe (please someone correct me if i'm wrong - i often am! ), is how many little mini calculations the dynamics engine will do in between the actual frames it has to create. the higher you turn it, the better (more realistic?) the simulation should be. say, for example, on frame 50, your car hits the pole. if its moving fast enough, on frame 51 of the dynamics solve, the bent part of the mesh may be intersecting itself. if that happens - mesh intersecting - then it may produce what you're getting, cuz it confuses the solver. but, if you tell the computer to calculate 100 substeps between frame 50 and 51, it may catch the part where the mesh intersects itself, and do the simulation properly.
thats why it takes so much longer to calculate.
maybe try turning on "avoid self-intersecting". that's gonna double your render time too, though. -
20 Apr 2006What i would maybe suggest... create a rough boxy shape around the outside of the car, then use that as the thingie in reactor, then use xform or some other modifier to contort the shape of the actual car mesh.
There are several good points about doing it this way:
1. it would speeden up calculation times
2. you might not have the same problem
3. it just plain smells better
Now I can't say i've actually tested this, but there should be a way of getting it to work, and the amount of detail in the collision would be based on the amount of detail in the bounding boxy mesh.
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