Light Include/Exclude

[Ismael]

Hi,

Excluding an object from a light does not also exclude it from the

radiosity solution, only from raytrace. I need to

make an object invisible to the radiosity contribution of the luminaire

also. The object should be fully renderable and accept radiosity from all

the other luminaires in the scene.

Is there a way to do this?

 

Thanks,

Ismael

[abicalho]

Light Include/Exclude is not supported for Radiosity.

 

But you can set a light to be excluded from Radiosity by turning on Exclude from Radiosity in Object Properties dialog.

 

It's mentioned in the Readme and/of Help.

 

Also, we're just following the real world lighting rules: no Include/Exclude per light.

 

Alexander

[Ismael]

Alexander,

Would you say that the VIZ skylight also follows real world light principles? I just can't seem to get the correct foot candles on the interior geometry through window or opening in a mixed interior/exterior scene. That is the question.

Thanks and regards,

Ismael

[abicalho]

I had the same doubts when I started working with Physically based sun and sky. But I then tested by turning my desklamp at home when the sun was coming through the window.

 

The sun was so bright that the lamp did not make any difference, which was very similar to the computer generated images.

 

Make a test and see for yourself.

 

Alexander

[Wojciech Klepacki]

Hi

You must double or triple the lux value to achieve the good visual effect. Maybe it is not physically correct but believable. This is the nature of sunlight. Make a test in real life: in sunny room try to turn on your desk lamp. Best regards.

[Ismael]

Actually I have found the same need to boost the lux value as you say. Not for starters so the scene be visually acceptable but to meet the physically correct intensity levels on the inner walls for the given window or opening! But then the ouside geometry gets too hot.

Ismael

[ZepSOFD]

Ismael,

 

When using real world sun values it is normal for the exterior to be blown out. As the light intensity inside gets decreased the outside openings will seem to appear brighter the opposite is also true if your interior intensity increases closer to that of the sun the openings will look more like they do when you look through your eyes and not on film. I know that you have been given information about work arounds from the other boards so I won't repeat them, and actually some of them actually sounded pretty easy to do without effecting rendering times hardly at all. My personal feeling is that I like that the exterior blows out it gives it more of a real photograph feel to it if your trying to use real world lighting values.

 

tom