Rain drops

Discussion about fluid simulation in Realflow 4
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Vitor Teixeira
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Rain drops

Postby Vitor Teixeira » Mon Jan 25, 2010 8:06 pm

http://www.vimeo.com/2286621
After several studies I couldn't recreate a good looking splash.
I have to move.
I find this video and the initial sequence is very interesting.
I've already tested this in RF.
At first I used only several drops falling in a "pool" (container) with a certain height.
But the "still water" becamed, after the second drop, very unstable so after watching the video again I noticed that the drop was always the same. The secret was in the post production.
My question is should I create this in realwave with all the drops or just create one and leave the entire work to post?
Thanks


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FA1LURE
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Rain drops

Postby FA1LURE » Mon Jan 25, 2010 10:01 pm

Hey,

I would try out these settings on a "circle" emitter when you get a chance.

You will need some daemons to randomize the process and maybe even animated to the "speed" of the emitter over time, but it can produce some nice results.

Emitter Settings:

Scale ( 7.5 , 1.0 , 0.6 )
R 1.0
D 1K
Int. P 0.1
Ext. P 1.0
Visc 20.0
ST 10000.0
Speed 0.5
V Rnd 1.0

Also, I'm working at Cinema 4D scale "0.01" so I am not sure how that will hold with you.


As far as the realwave is concerned, there are a few topics in older posts where you can find some valuable information on what you might be addressing.

Good luck!
Defeat enemies with success.

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Vitor Teixeira
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Rain drops

Postby Vitor Teixeira » Tue Jan 26, 2010 12:13 am

Didn't understand something.
These values are to fill the container right? with random particles and then use a kvolume to stable or to "kill" the entire water movement?

Or these values are for the drop itself?

Thanks for your explanation but I'm not understand it well.
Cheers

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FA1LURE
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Joined: Sat Feb 02, 2008 1:11 pm

Rain drops

Postby FA1LURE » Tue Jan 26, 2010 3:10 am

Hey,

Sorry for not being specific enough. The settings provided should be used on a "Circle" emitter.

I thought I said that the first time? lol.

Anyways these are not the settings for the fill object or anything else,

Use them to make "Drops".

Hope I cleared up any discrepancies.
Defeat enemies with success.

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Vitor Teixeira
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Rain drops

Postby Vitor Teixeira » Tue Jan 26, 2010 3:45 am

lol
Sorry, the confusion was because I don't usually use a fill object, I fill an container with a circle emitter.
That's why the confusion.
I'll test it.
What do you recommend to the still water? More viscosity?

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FA1LURE
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Rain drops

Postby FA1LURE » Tue Jan 26, 2010 5:33 am

Here is a test scene. For the water, like i said, it could be realwave or an actual filled object.

I guess I only am giving you a solution for the rain itself, which is probably not the best, but it has worked for me.

The drops are nothing special, obviously I would love for them to act, look, and feel like a real rain drop, but they are mainly tiny sphereish looking groups of particles as you will be able to see from the scene provided.

I'll try and compile a working scene tomorrow if I have a chance.





Rain Drops
Defeat enemies with success.

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Vitor Teixeira
Posts: 312
Joined: Thu Jul 23, 2009 1:47 pm
Location: Porto, Portugal
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Rain drops

Postby Vitor Teixeira » Tue Jan 26, 2010 2:15 pm

A huge thanks.
Cheers

nights
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Joined: Thu Nov 22, 2012 5:41 am

Re: Rain drops

Postby nights » Thu Mar 14, 2013 3:47 am

This was really useful! They are quite large in scale so your geometry need to be large, too. I hope the inaccurate scale doesnt affect the perception of the simulation as rain drops!


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