1st attempt and a few questions

[Zakkorn]

Its my 1st attempt and I tried to be close to the concept of the image.
But as you see on the video still needs a lot of corrections.

How can I make the splash more SPLASH! (in the image you have the idea of what I want to achieve)
In the video the corona that is created is too short. And generally speaking the splash is poor compare to the image.

The settings where 1.3 cm grid res. the grid dimensions: 135x102x125
Sub steps: 8
For the Slow motion the time scale went to 0.25 and the sub steps to 2.
The radius of the sphere is 17cm.

Whe I try to resimulate only the foam after a few frames I get the message "Cannot Start the Resimulation - grid dimensions mismatch!"
But I haven't change anything except some options in the foam section. (amount, rise speed etc.)
This happens after about 10-11 frames after the initial collision with the liquid.

Regards,
Zach

[joconnell]

You can increase the "motion velocity effect" of the sphere from the right click > phoenix fd properties menu, Also perhaps putting a slight noise modifier on to the sphere so it isn't as smooth will break up the water a bit too.

Oh yeah - way higher cell count too, for small details you have to give phoenix enough cells. It's really quick though so you can definitely go higher without killing yourself with sim times

[Zakkorn]

Oh I didn't know about the Velocity multiplier. I will try playing with this.
Thanks for this.
And yes the higher the cell count the bigger/complicated the splash.

Also I noticed that higher the resolution produces less bubbles from foam.

In 1.3cm grid resolution I get more bubbles from the collision with the foam set to 2 than with 1.024cm res in the foam set to 4.
Why is that?

And also about the error I got, makes me to not use the resimulation.
So I have to simulate everything from start.

[georgi.zhekov]

Hello,

Producing less foam while increasing the resolution is a bug and we'll work on that.

As for the Resimulation - do you have velocity exported for all of the frames you want to resimulate?

[Zakkorn]

And I thought that it was the way it worked, so I could get used to it. :P

As for the resimulation, yes I have added the velocity channel.
Because otherwise, if I don't have it enabled, it shows a message ( I cant remember) from the beginning of the simulation.
So something is wrong, but what?

[georgi.zhekov]

Can you send us the scene so we can take a look what is going on?

You can attach it here or send it to support@chaosgroup.com with link to this thread.

[Zakkorn]

Sure.
I will send it as soon as I return home from my work.

[Zakkorn]

I have another question though.
I made an even slower slow motion than this.
0.125 timescale.
There, the bubbles (and some parts of the liquid) are flickering a lot.
How can I reduce the flickering?

[georgi.zhekov]

Adding smoothing to the mesh (check "use Liquid particles for Smoothing" as well) and more grid resolution should help with the flickering.

[georgi.zhekov]

What version of Phoenix are you using?

In the nightlies we did some fixes for the resimulations with the error you have.

[Zakkorn]

The higher the grid res the bigger the splash. So I stayed at 1.3 grid res.
and how this can it help with the flickering on the bubbles? Unless this is only to help the flickering on the liquid mesh.
I have to check if I have already checked the "use Liquid particles for Smoothing" :P

I am using the latest official build 3.01 (if I remember)
no nightlie.

[Zakkorn]

Yes I already had the Use Liquid Particles checked.
So I don't know what else to do for the flickering

[Zakkorn]

Btw I have sent 2 scenes for inspection.
My main concern is to find a way to solve the flickering on the bubbles.

[Svetlin.Nikolov]

Hey,

Just wanted to drop in and recommend you the nightlies - you can request access from Support and you'll be able to check all the latest fixes, improvements and features.

Cheers!

[Zakkorn]

Yes, it would be better if I have access to nightlies.
I want to mention that I reduced the grid size of the simulation from 1.3cm to 0.8cm and the problem stayed the same.
Still a lot of flickering on the mesh and on the bubbles.
If I put the smoothness of the mesh more than 2, I have another issue.
The camera "sees" at the side, to have a more complete view of whats happening outside and inside the water during the splash (you understand what I mean).
because of that if I put more than 2 in the smoothness mesh value, I have a more pronounced refraction under the water so that the ball looks very distorted.
I will put some images later when i return home from my work to see what I mean.
Also when I made the simulation grid smaller (0,8cm) when the ball was inside the water I had some water that "stacked" underneath the ball but look odd.
I will put an image of that as well.
I had the object's Clear Inside = True

Regards,
Zach