Lighting Balance

Balancing Sun, Sky and Artificial Lights using IRender nXt

When producing exterior scenes at dusk, or interior scenes with light from windows, you will want to balance the Sun, Sky and Artificial Lights.

Using Lighting Balance Settings

Lighting Balance Slider

The default lighting balance on the Light Setup Tab, and on the Presets Tab is 60. To make the Aritficial Lights brighter, move it to the right. To make the Sun and Sky Brighter, move it to the left.

You will need to re-render the scene to see the effects.

Brightness Slider

Note: As you balance more towards Sun/Sky or Artificial Lights, the Automatic Exposure will keep the scene brightness about the same. If you want to make the entire scene brighter or darker, use the Brighness Slider - after rendering - to adjust it as desired.

The image below sun, sky and articficial lights and a light balance setting of 60.

This image has the light balance setting lowered to 20. File:Sample retail night - balance 20.jpg

This image has the light balance setting raised to 90. You can see more of the effect of the street lights and lights inside the building. Raising the level above 90 would make this effect even more dramatic.

And this final image has the light balance at 90, but the brightness lowered from 50 t0 45, which produces more of a dusk effect. (Of course, for dusk or nighttime, it would have been smart to turn off the sun, or remov eit with Lighting Channels)

Lighting Channels

With IRender nXt you can use Lighting Channels to quickly increase the intensity of the lights, or decrease the intensity of the sun and sky after rendering.

Lights are placed in up to 8 separate groups and can easily be adjusted with sliders during and after rendering.

By default,the Sun, the Sky, ceiling lights, and other lights are placed in four groups so you can easily balance them.

You can also place individual lights, or groups of lights in the remaining groups if you want more control.

Adjusting Wattage of Individual Lights

If you want to increase or decrease the effects of individual lights, you can also adjust the Wattage of the lights.

For lights created with the Light Wizard, you can right click on the light and set new values:

Here is a Spot Lamp placed from the Light Wizard, and the Right Click - Edit Lamp dialog to change its settings;

For other lights, or components which contain 1 or more lights, you can override the Wattage of the entire component with a right click.

Adjusting SketchUp Shadow Settings

The Light and Dark Settings on the SketchUp Shadow Settings Window are use to set the brightness or the Sun, Sky, and the amount of cloudiness.