Excluding and object from Light in Rhino

[four_hands]

Hi Chaos Team,

Can you guys please add option in V-ray light to exclude an object same as 3ds max.

It would really solve many problems and help user to create amazing render in Rhino.

[zxhy_zxhy]

This feature is very useful, I don't know why VRAY don't do it

[Peter.Chaushev]

The main decision to not implement object exclusions from V-Ray lights illumination is to not encourage the creation of unrealistic results. The main goal of V-Ray is to offer tools for achieving believable photorealistic imagery and we had noticed that options, such as the one discussed, would often be incorrectly used and drop the quality of the final output.
Our recommended workflow is to set up your scene illumination as you would in real life with light source composition and intensity based on actual real-world examples. Combining such a setup with the V-Ray Camera settings which you can control in a similar way to a DSLR or a mobile phone camera ensures the render output is as close to a photograph as possible.

Any examples of scenes where you find the usage of object exclusion from light a necessary feature would be appreciated!

Kind regards,
Peter

[tacgi]

We can make lights invisible, or turn off their decay. We can exclude lights from various aspects of the material. We can even tell a light to not cast shadows. However, we can't exclude objects from being affected by a light because "realism"? You can surely see that this reasoning doesn't quite add up. Any one of these other settings will result in unrealistic results.

Take a look at any real film set or professional lighting rig in an animated film. Light is manipulated unnaturally, even in real life (if not even more so). Since the camera does not work like the human eye, the cinematographer/light rigger must add lights here or block lights there so that the image we see on the screen matches what we would expect to see with our eyes. Yes, we can surely model light blockers, reflector screens, etc, but one of the joys of 3D is that we can do the impossible. I shouldn't have to model an off-screen blackout curtain because I don't like the way a rim light is reflecting off a wall. In fact, I want that rim light to only affect the subject, not the surroundings.

I understand that it's in the interests of Chaos Group to make their products as idiot-proof as possible. All it takes is one very vocal person who doesn't understand the include/exclude function to give the rendering engine a bad rep. Maybe we can arrive at some kind of comprimise where artistic freedom isn't removed but rather hidden behind an "advanced" panel or something like that?

[Micha]

The main decision to not implement object exclusions from V-Ray lights illumination is to not encourage the creation of unrealistic results.

I don't like this argument either. V-Ray is a tool for professional use and I prefer artistic freedom. Functions that could be abused by beginners can be hidden in advanced mode.

[javierrentas]

The main reason why I love V-Ray is for the freedom that we have. I do not like the templates software. Yes, they are easy to use but most of the renderings look the same. Most of my clients do not understand how the light, and materials environment works. They do not care about being physically correct. They only care if they look good. Sometimes they want something that does not make sense. So we need to produce what they want. This feature is a must to have for me because that helps me to enhance or produce high light for specifics object and avoid is to have in adjacent objects.

[zxhy_zxhy]

Perhaps this is a 3DSMAX patent and VRAY is not allowed to do so