2 replies to this topic

[Quat]

I need a rendering method to simulate the white water splash that occurs when water drops and splashed on other water, like a waterfall or fountain:

 

http://3.bp.blogspot.com/_hbg4TjmsPTM/SWqaOEmiLyI/AAAAAAAABgM/Wr0610_fIq8/s320/2+Fountain+Splash.jpg

 

I have tried additively blending particles, but it does not look that realistic, so I'm wondering if maybe there are other methods?  Target hardware is DX11. 

 

Also, general physics question: why does splashing water make it turn white anyway?

[TiagoCosta]

I need a rendering method to simulate the white water splash that occurs when water drops and splashed on other water, like a waterfall or fountain:
 
http://3.bp.blogspot.com/_hbg4TjmsPTM/SWqaOEmiLyI/AAAAAAAABgM/Wr0610_fIq8/s320/2+Fountain+Splash.jpg
 
I have tried additively blending particles, but it does not look that realistic, so I'm wondering if maybe there are other methods?  Target hardware is DX11.

 

A combination of animated sprites (looking like foam) and particles (the splashes) should do the trick... Check the effect in GTA:IV

 

Or maybe there's more recent techniques (maybe physically based?) that I'm not aware of.

 

Also, general physics question: why does splashing water make it turn white anyway?

 

Beacuse of bubbles http://www.weather.gov.hk/education/edu06nature/ele_beach1_e.htm

[GeniusPooh]

in that case most people use some mesh.

 

with normal alpha blending ( not additive - additive is just good for magic or light)

 

by moving texture on mesh surfaces.

 

but if you try to make close and curvy surface like what you show to me.

 

you must render it twice.

 

first pass is render object CW and secound pass is render CCW.

 

but still alpha blending problem to make complex situation.

 

so best way is minimize alpha problem from designing stage.