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I have an object with a glass material in VRay. All photographers know to light glass from behind. When I put a V-Ray Plane light behind an object with a glass material the refraction looks fantastic.
But, I can see the white shape of the light behind and I want my object on a very dark background. When I make the light 'Invisible' (like we always do when we don't actually want to see the physical light object) the refracted light coming through goes away.
What I've always loved about 3d lighting is the ability to do things with lights that you can't in the studio, most importantly, being able to hide the light object and still have it cast rays.
Is there a way to have a light behind a glass object and hide it and still have the light come through?
I've included two renders. On the left is the light behind and the nice refraction. On the right I've made the light 'Invisible' and background looks like I need it to but the refracted light is gone. The reflection under the object is there so I know the light is on but the refraction is gone.
I know I could render an alpha and composite to remove the light behind the object but I'd rather just have it be invisible and still function properly. I also realize that I can change the 'Fog multiplier' in the material to 0.01 and see the light but it fills the entire object. I lose the hard edge of the light as seen through the object.
But, I can see the white shape of the light behind and I want my object on a very dark background. When I make the light 'Invisible' (like we always do when we don't actually want to see the physical light object) the refracted light coming through goes away.
What I've always loved about 3d lighting is the ability to do things with lights that you can't in the studio, most importantly, being able to hide the light object and still have it cast rays.
Is there a way to have a light behind a glass object and hide it and still have the light come through?
I've included two renders. On the left is the light behind and the nice refraction. On the right I've made the light 'Invisible' and background looks like I need it to but the refracted light is gone. The reflection under the object is there so I know the light is on but the refraction is gone.
I know I could render an alpha and composite to remove the light behind the object but I'd rather just have it be invisible and still function properly. I also realize that I can change the 'Fog multiplier' in the material to 0.01 and see the light but it fills the entire object. I lose the hard edge of the light as seen through the object.
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