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Particles crossing object

Posted: Thu Apr 04, 2019 11:29 am
by slamelov
Hi

I have exported a bottle and a glass from 3D Max using Rf connect. 3D Max 2018.

I want to fill the glass with the bottle in RF, but the particles go through the bottle when the movement beguins. There is not "degenerated faces".

Sets are:
Geometry Scale: 1.0
Emitter Resolution: 20
Interpolation: Local


What could be wrong?

Re: Particles crossing object

Posted: Thu Apr 04, 2019 12:37 pm
by Oldcode
What type of particles are you using? Look like standard, but I can't tell because your image is cut off.

Also, check collision settings in your object properties. Is it set to Solid Outside, Solid Inside, or Shell.

Another thing that might be the problem is the direction your normals are facing in your model. I'm guessing inside 3DSM, the normals are facing outward. You could try flipping the normals and see what happens.

The polygons on your model may be too small to interact with the particles. Trying increasing the Scene Scale.

Good Luck,

Re: Particles crossing object

Posted: Thu Apr 04, 2019 1:34 pm
by slamelov
Thanks for the answer

I have modeled the bottle in 3D Max with a double spline and lathe modifier, then, used Xform modifier and converted to editable poly. The scale in 3d Max is in Cm, and the bottle is about 40 cm height. Normals are facing outside.

The particles are standard and collision settings are both. Scale in Real Flow is 1.0.

Re: Particles crossing object

Posted: Thu Apr 04, 2019 5:44 pm
by ChristianZ
SD-files are not included in RealFlow scene files. Please give us the sd-object.

Re: Particles crossing object

Posted: Fri Apr 05, 2019 7:10 am
by slamelov

Re: Particles crossing object

Posted: Fri Apr 05, 2019 8:08 am
by ChristianZ
That website is asking for a "Decryption Key"

Re: Particles crossing object

Posted: Fri Apr 05, 2019 8:41 am
by slamelov

Re: Particles crossing object

Posted: Fri Apr 05, 2019 9:52 pm
by ChristianZ
Ok, so now I could load the scene with the proper objects and sim in RF10.

Oldcode is right, of course, about the scene scale and checking for normals for the overall improvement. The models look ok and they hold the particles when the timeline is locked.

The main problem here is the large movement/steps of objects. That is coming in from 3Dsmax and you cannot fine-tune it anymore in RF, unfortunately. The solution could be to change frames per second of the scene in 3Dsmax (I don't have it, but is like I would do in Cinema4D), and export again an SD-file that would then appear like a slow motion. In this way you have only small steps and the particles can keep up during simulation.
I did once a scene with a falling paper cup containing coffee and after having some problems with over-acting liquid I made a super slow motion scene (more like a joke actually, the movie is 18 minutes). But in the end it worked :)
https://youtu.be/QzfDd8eOGKg

Re: Particles crossing object

Posted: Sat Apr 06, 2019 4:22 pm
by slamelov
Thanks

So, should I change FPS from 30 fps to 60 fps in Max and Real Flow?

Re: Particles crossing object

Posted: Sat Apr 06, 2019 9:10 pm
by ChristianZ
More steps, maybe try 300 FPS, but first only in 3Dsmax and import into a project in RealFlow that is set to 30fps.