hi . in houdini demoreel i see effect that iwnt to know how to do that . i attach video link . can any one tell how to do this? thanks


https://vimeo.com/100976858 [vimeo.com]

Welcome to Houdini world my friend :wink:
You have too many way for this purpose , You can use Viscosity Attribute like uploaded project , Or you can put Flip particles inside of your collision object , Then extract your collision mesh from specify point , something exactly like “Oily Lion” project that I made for my VFX Demo Reel :idea:

Watch “Oily Lion” project on my VFX Demo Reel from below link (in time 1:18"):

http://www.jkcompany.org/JK_DemoReelsAlbum.html [jkcompany.org]

And I made a simple project about Viscosity method in the Attached File :wink:

but after that another problem is how to change the shader ? for example how to change ice cream material into water material as seen in demoreel i posted? thanks?

The simplest way is to do it in the compositing , But If you wanna do it in the 3D project , you should use Layered materials algorithm for mixing two different shader :idea:

for more information check these topics :

http://www.sidefx.com/index.php?option=com_forum&Itemid=172&page=viewtopic&t=26258&highlight=layered [sidefx.com]

AND

http://www.sidefx.com/index.php?option=com_forum&Itemid=172&page=viewtopic&t=26947&highlight=layered [sidefx.com]

:wink:

You can also just mix two different surface models with a mix node and animate the bias.