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Tone Operator



The Tone Operator Tone operator button.png is used to modify your rendered image after it is created:

Tone mapping is the process of converting the luminance data used by nXt into displayable or printable RGB pixels.

The tone-mapping controls are located in the upper left corner of the render screen. The Brightness control is the most important. In nXt, you cannot control the overall scene brightness by boosting the intensity all of the light sources. The automatic exposure adjustment built into the tone-mapping process will defeat this attempt. Adjust overall scene brightness by using the Brightness control.

Tone Operator

The tone operator controls the mapping from luminance data to RGB image data. It is the sophisticated set of rules AccuRender uses to create a displayable picture from the lighting values collected during a raytracing or radiosity process..

Settings

The Brightness control is the most important. In IRender nXt, you cannot control the overall scene brightness by boosting the intensity all of the light sources. The automatic exposure adjustment built into the tone-mapping process will defeat this attempt. Adjust overall scene brightness by using the Brightness control.

  • Brightness - The Brightness control is the most important.
Adjusts the overall brightness. For example, if a white surface in your model is rendering gray, you can increase the brightness until the surface appears white. Or, if your exterior scene seems overexposed, you can decrease the brightness until the scene appears more correct.
The default setting is 100 — smaller numbers produce darker images. For most renderings, small changes produce noticeable effects.
  • Contrast - Adjust the contrast of the image.
Lowering the contrast makes the image more gray.
Raising the contrast make light area lighter and dark areas darker.
  • Burn - Burn changes the white point of the image so that less than max brightness objects will map to white.
See: Using Burn
  • Saturation - Controls the amount of color included in the rendering.
Slide it to the left to create a gray image.

Defaults

Restore the default settings.

See also