Volume Light

[Infrared digital]

I was having a look at the Spot 3D help file;

http://www.spot3d.com/vray/help/150S...ronmentfog.htm

and found at 'Example 5: Volumetric caustics' a volume light - how can I do this ?

There is an example model but on close inspection it doesn't make sense as to how I can turn it into a volume light either.

Thanks

N

[Infrared digital]

Can I create VOlume Lights with VRay ?

[vlado]

You can do that in two ways:

1) Use the 3ds Max "Volume fog" atmospheric; this works with standard lights only (Omni, Spot, Direct) and with shadow maps;

2) Use a VRayEnvironmentFog atmospheric effect which works with any lights.

Best regards,
Vlado

[LarsSonparsson]

I did this earlier just to find out how volume caustics works.

You can download max scene below. I hope it helps.

http://dl.dropbox.com/u/2909824/volumecaustics.max




-LarsSon

[Infrared digital]

Thanks for that Lars, I will have a blast at that later.

[Infrared digital]

When using a standard spotlight and the Volume light effect, it just renders a black cone.

When using the VRay Environment effect and selecting the spotlight as the only source, it renders fog in the entire scene.

How can I confine the fog to the light ?

[Alan Iglesias]

Can I create VOlume Lights with VRay ?

Seems to work just fine here...

Here's a sample max/vray file for you to look at...

http://www.alaniglesias.com/VrayVolumeLightTest.max


-Alan

[Infrared digital]

Hi Alan

I can't even open your file - did you make it in Max 2010 ? I am running 2009.

Thanks for your help though.

[Alan Iglesias]

Here's a 2009 version...

http://www.alaniglesias.com/VrayVolumeLightTest2009.max

-Alan

[Infrared digital]

Hi Alan

I got that to work but not straight out - I had to create a VRay camera and play with the shutter speed and film speed but, it works so, thanks for that !

My units are in metres, maybe that might have an affect on it.

N

[Alan Iglesias]

Hmmm..not sure what might have happened there...it was just a straight file open here.

Glad it worked for you, though.

-Alan

[Infrared digital]

Hi Alan

I reduced the f-stop to 2 and it works fine now - thanks for your help !

[Alan Iglesias]

Most welcome! I'm glad it worked for you...

-Alan

[chad]

Seems to work just fine here...

Here's a sample max/vray file for you to look at...

http://www.alaniglesias.com/VrayVolumeLightTest.max

-Alan

Any way I can get you to re-upload the test file? I am haing the exact same problems as Infrared. If I use regular volume lights, the light is always a dull grey, and If I use Vray environment fog, the only way I can get the fog to show up is if there is fog in the entire scene, and not just the light cone.

[Alan Iglesias]

Hmmm...yeah, I did delete them during some housecleaning recently. Sure, I'll put 'em both back up there...

http://www.alaniglesias.com/VrayVolumeLightTest2010.max

http://www.alaniglesias.com/VrayVolumeLightTest2009.max

-Alan