Removing ambient light from Specular Element

[sebbiej]

Hi guys,

To fake GI (as we're short of time here), we're using an ambient light with a dirt shader applied to it, that works great for adding in some fake GI, but the ambient light is showing up in the Specular Element of the renders, would any one know how I could remove it?

Using Maya 2015, Vray 3.

Thanks!

[vlado]

The ambient light has a parameter "ambient shade", set it to 0.0 to remove the highlights.

Best regards,
Vlado

[sebbiej]

Thanks Vlado, but I had tried that, it still seems to create a hotspot in the specular element though!

The below are taken from a very simple scene, a cube (3 sides taken away) with an ambient light (with a dirt map as the colour) placed in the centre, Ambient Shade set to 0. And a grey Vray shader with the reflection glossiness set to 0.829.

Link to a sample file: https://www.hightail.com/download/bX...T01ENlNGa2RVag

[ivaylo.ivanov]

Hm, this looks like a bug. Will investigate it.

[sebbiej]

Ah fair enough!

Great, thank you for the help!

[ivaylo.ivanov]

Will fix this. If you want work-around, this can be fixed with post translate python:

from vray.utils import *
lights = findByType('LightAmbient')
for light in lights:
	light.set("specular_contribution", 0.0);

[sebbiej]

Many thanks for the quick help and the work around. I'll give that a try!