Sand Volume Erosion Test
http://vimeo.com/30949913 [vimeo.com]

Hi there~
I just tested surface erosion using levelset in houdini.
All of the detailed methods are in Daniel P.Ferreira's technical demonstration.
wonderslime.com/​

Cool! I had forgotten how awesome those sandman effects are!
Thanks for the reference as well

very cool, hope you bring us more!

cheers!

thanks~ rafaels, dim1984kimo

Can you tell about something.. ?

Hi all, could someone explain what exactly level set are out of interest ? As this looks like a sop solver effect transferring attributes to create erosion, wondered if I'm missing something.

Lyonz
Hi all, could someone explain what exactly level set are out of interest ?

In Houdini-parlance, they are Signed Distance Fields, a.k.a. SDF's.

So basically Signed Distance Fields are layers of the same volume ? aka level sets

Lyonz
So basically Signed Distance Fields are layers of the same volume ? aka level sets

Nope. SDF is a volume telling how far from the nearest surface you are at any point in space. Subtracting/adding from the value gets you a new parallel surface which is inside/outside the original surface - pretty handy for erosion-type effects.

http://www.sidefx.com/docs/houdini11.1/model/volumes [sidefx.com]
http://www.sidefx.com/docs/houdini11.1/nodes/sop/isooffset [sidefx.com]

sorry for late reply

Here is the file~

As you can see, that file consist of complicated node as my lack of skills.

However, you will get fundamental idea how I achieve that motion in houdini.

thanks a lot .. it's very good/