Ambient Light

Ambient light is a constant light that is added to the rendering. IRender adds Ambient Light to a scene to represent more realistic lighting effect without having to enter every actual light source. Ambient Light is light applied to the entire scene. Using Ambient Light, you can highlight parts of an image with an actual light, and use Ambient Light to provide a flat, but usable illumination for the rest of the scene.

Decreasing the amount of ambient light generally produces images with more contrast. Too much ambient light can make a rendered image seem flat and uninteresting; too little can cause excessive contrast.

IRender nXt also uses Indirect Lighting which calculates the effect of light bouncing off of surfaces and illuminating other surfaces. This reduces the need for Ambient Light.

Note: I know everybody wants an "easy button" which will just make the scene look the way you want. But you will need to adjust some things to get lighting right. Be sure to use the Brightness Slider and Tone Operator to adjust the brightness of the rendered image.

Brightness slider on render window


Ambient Light presets


Ambient light levels are automatically set with each of the preset, default, lighting types on the Presets Tab .

  • High Dynamic - sets Low Ambient Light. (also sets Studio brightness - even lower)
  • Exterior - sets High Ambient Light.
  • Interior w/sun - sets Medium Ambient Light.
  • Interior no sun - sets Medium Ambient Light.

These levels can be overridden on this Presets Tab.

The balance between ambient light and artificial lights can adjusted on the Light Tab .

Ambient Light Balance

Light Tab.jpg

You can use the slider on the Light Setup Tab to adjust the balance between lamps and Ambient Light. (Default 50%)

Note:This slider adjusts ambient light vs artificial light. If you want to adjust the effects of sun and sky, you need to use the sliders on the Sky Tab .

Default Interior Ambient Light Balance

Balance at 90% - mostly lamps

90% Ambient Light Balance - mostly lamps.

Balance at 10% - mostly ambient

10% Ambient Light Balance - mostly ambient.

Frequently asked questions

  • This is a 6-sided cube viewed from the inside. There are no lights. Why is the ceiling brighter than the floor? ( I get the same result with earlier versions, and without textures on the walls.)
The ambient lighting is intentionally non-uniform-- more light is directed upward.

See also