How to increase air pockets on fruit splash setup

[roboxx]

Hi,

i`m working on a scene, where a cosmetic bottle is falling into a water pod ( similar to the fruit splash scene but in slowmotion).
Right now i`m struggling a bit how to achieve / control the amount of airpockets, which are generated around the product once it is under waterlevel.
I guess it`s somehow related to the force of the impact / falling speed, but this also impacts the amount of splash / water crown over the water level, which i dont want to be to massive.
I found a nice example of falling tomatoes on youtube ( Sec. 0:48 ) and was wondering, how it was setup./ achieved.

https://www.youtube.com/watch?v=UTuhCRhB_ro

Here the main air pocket is nicely irregularly, almost like a smoke cloud, with additional smaller different sized air bubbles which separates quite realistic from the tomatoes and raises to the surface.
On my tests its more like one solid and compact air pocket which looks more like jelly.

I could certainly activate bubbles on the liquid source, but these are perfectly round....looking for that smooth but fractal air pocket look as in the tomato scene on youtube ( little bit like boiling water ).

Do i maybe have to add a second PhoenixFDLiquid to emitt some "smoke clouds" and give it a water shader like in this underwater oxygen explosion....?

https://www.youtube.com/watch?v=nwCZYrfMDd4

Any help on this would be great.

Thanks

Robin

[slavina.nikolova]

Hey,

You could try increasing the bottle's Motion Velocity Effect to create more interesting splashes. This option allows you to control the impact of a moving object over the fluid. The higher the value, the stronger will be the reaction of the liquid to the movement of the bottle. Select the cosmetic bottle, and right-click on it, and select the Chaos Phoenix Properties.

Also, here is our Fruits Splashing tutorial - https://docs.chaos.com/display/PHX4MAX/Fruits+Splashing, if you haven't seen it yet, you might find it useful.

After getting everything else working well, you could try the underwater bubbles video technique that you linked at the end of your post.


Hope this helps!

[roboxx]

Hi Slavina,

thanks for your quick reply. I already played with the settings for Motion Velocity Effect and increased it, but the downside ist, that the splash over the water surface also gets exagerated and much less increase in the air pockets around the falling object........thats what i`d like to avoid.
When looking at the falling tomato video, i recognize a strong creation of air pockets / bubbles under the water surface which looks great, but above the surface the splash / wave / crown is quite subtle.....thats what i`m looking for and try to achieve.
I also took already a look at the Fruit Splashing tutorial and same problem here....massive splash on the surface but very little air pockets / bubbles around the falling object.

So any other ideas how to achieve these air bubbles like in the tomato splash video ?
Thanks for help

[Svetlin.Nikolov]

Hmm, how about if you connect the bottle to a Source in Volume Inject mode and add a tiny bit of Inject Power, with the Emit Liquid option OFF. This should push the liquid away from the object.

[roboxx]

Hi Svetlin,

sorry for the delayed response on this, but the project got on hold for some weeks.
I tried your suggested workflow but the result was not the desired effect & look.

I´m still struggling with how to control the amount of generated air pockets and the look and movement of them. Is there a way of injecting air into a liquid in PhoenixFD ?
Here is an example what i`m trying to achieve:

https://www.filmsupply.com/clips/fru...me-water/98921

i somewhow managed to get the first part of this video, where the air is following the strawberry into the water but still haven´t found a way to get lots of these nice smaller roundish but also irregular formed air bubbles, which are detaching from the fruit and drifting to the surface.

I also found some nice fruit splashes from Hammer Chen ( Technical Expert at ChaosGroup ). Is he still in the company and willing to share his setup for these type of animations ?
https://www.artstation.com/artwork/awDZX

Thanks

Robin

[Svetlin.Nikolov]

Sure, he is on board and here is this setup made into a tutorial: https://docs.chaos.com/display/PHX4MAX/Fruits+Splashing

How did the results with Inject mode look like? Perhaps it will be a matter of tweaking in order to get more air pockets, but this should work.

Also, note that Phoenix does not simulate air underwater, so the air pockets you see would not preserve their volume - they would expand and shrink without taking into account the amount of air trapped inside. Please check these two videos for other ideas you could use:

Cheers!

[roboxx]

Ok, thanks for your feedback, will give it another try and take a look to the videos.

[roboxx]

so i gave inject mode a second try, played with the settings and came to an acceptable result.
Certainly you can still see that the air pockets are sowmhow genrated from the object and not being trapped and dragged by the falling bottle.......but as a workaround its working.
So thanks Svetlin for this advice.and if somehow possible to add in future releases....a generator for real air pockets which keep their volume and drift to the surface would be nice for a future relese.
As mentioned in another post i`d also love to see a parameter for - liquid stickiness by object -. and a quick way for an animatable and realistic looking condensation function would be cool.

Best

Robin

[Svetlin.Nikolov]

Awesome, added a note for future development, thank you!