How do i do volumetric light in houdini using Vray fog?

[moises_penamoreira]

Hello!

I´am trying to do a volume light in Houdini but i dont know how to do it. I know how to do it in Vray for Maya, but not in Houdini. Could somebody help me? I´m leaving an image below that i found online as a reference for what i am intending to do.

[david.anastacio]

HI moises_penamoreira,

In the /OUT context and an environment node and in there add a fog node (just drop the node in, no connections needed), then just link the environment node to the Environment slot of your ROP node.





Best,
David.

[moises_penamoreira]

Hey! Thank you man! But, do you know how can i apply fog to be emitted from one specific light? I am sending an image below. The first image is the atmosphere pass showing the fog being emitted just from the lampshade that i did in Maya and Vray. The second one is my final render. I dont want fog in my whole scene, just in one light. How can i do this?

[david.anastacio]

Hey again,

Just change the Light Mode in the Fog node to Selected Lights and add the lights you want there.



Best,
David.

[moises_penamoreira]

Thank you very much! It worked! God bless!