Light Fog In Houdini

[haggi]

I'm quite new to houdini. Can anyone give me a hint how to create a light fog in houdini. I mean the visible light rays from a spot light or sun in a dusty or smoky environment.

thanks.

[jhiggins]

you need to create an atmosphere object and attach to it an atmosphere shader. i believe both mantra and rman shaders should work!

good luck,

jeff

I'm quite new to houdini. Can anyone give me a hint how to create a light fog in houdini. I mean the visible light rays from a spot light or sun in a dusty or smoky environment.

thanks.

[symek]

Here is a fake caustics and rays example but for H8, not sure if it still works in H9:

<a href="http://www.sidefx.com/index.php?option=com_forum&Itemid=172&page=viewtopic&t=8451&highlight=caustics" target="_blank">

http://www.sidefx.com/index.php?option=com...hlight=caustics</a>

Edited September 27, 2007 by SYmek

[haggi]

Thanks a lot. So it is similiar to the mentalray parti volume in maya. I think this will help a lot.

[Jason]

Thanks a lot. So it is similiar to the mentalray parti volume in maya. I think this will help a lot.

Here is a simple scene that uses some patchy Volumes (in Houdini 9) and renders it. Note I'm raytracing the shadows - you can speed things up if you switch to Depth Map Shadows probably. Raytracing just give instant resultants, useful more as a guide.

lightsmoke.hipnc