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Post Processing

Post Processing refers to changes made to a rendered image after the rendering is complete.

IRender nXt includes several post processing features to make changes to your rendered image without the need of using other third party software.

Some of these changes are available from icons on the toolbar toolbar above your rendering. Some others are only available after switching to nXtImage mode. (See FX Wizard below')

FX Wizard

All of these Post Processing Functions are combined on the FX Wizard.

When first loading the Wizard your rendered image will be converted to nXtImage format so that the Haze and Depth Blur changes will be active.

Select the desired effects from the icon area on the left.

The Tone Filters, Material Channels and Lighting Channels are also directly available from the icon toolbar above your rendering.

FX Wizard

Automatic Luminance

Automatic Luminance or Photometrics automatically adjusts the overall intensity of your rendering, much like the automatic exposure on a camera.

If you want to adjust Lighting Channels or other items without having Photometrics apply, you can lock the Average Luminance on the Lighting Channels Wizard.

See: Automatic Luminance

Self glow3.jpg
'Lock Automatic Luminance to freeze intensities while adjusting Lighting Channels

Brightness Slider

Quickly Adjust lighting with the Brightness Slider .

The Brightness control is the most important Tone Operator control 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.

You can adjust overall scene brightness by using the Brightness control.

See: Brightness Slider

Brightness slider.png
Brightness Slider
Use the Up and Down arrows to
fine tune the brightness setting.

Lighting Channels

Adjust the effect of sun, sky or groups of lights.

This is an excellent way to change a rendered scene from daylight scene to a nighttime scene without having to re-render it.

Check out the Lighting Channels Video

See: Lighting Channels

Lighting Channels

Material Channels

Adjust the color or luminance of a material after rendering.

With Material Channels you can select a face in the rendered image and adjust the color of all pixels rendered from the same material using the slider bars.

You can also use material channels to adjust the brightness of "glow" images - such as the screen on the monitor in this sample image.

Check out the New Video
See: Material Channels

Using Material Channels to make a wall appear whiter.

Adjustments and Filters

Adjust Contrast, Burn and Color Saturation as well as Brightness.

  • Brightness - Brighten or darken the image.
  • Contrast - Increase or decrease image contrast.
  • Burn - See: Using Burn
  • Saturation - Increase or decrease color saturation.


See: Adjustments and Filters

Tone Operator

Image Filters

Image Filters can sharpen or smooth your rendered image, or be used for other special effects such as creating an embossed effect.
See Image Filters

Image Filters.jpg
This Emboss Filter will only rarely be used for Photorealistc Renderings. Check out the other filters at: Image Filters

Background Wizard

The Background Wizard makes it easy to position your rendered model in a background, and to remember the settings for future renderings.
See Background Wizard


By dragging the handles, you can adjust the background as desired.

Real Time Haze

Apply Real Time Haze or fog to your rendering as a post-process after the rendering is completed.
See Real Time Haze

Real Time Haze

Depth Blur

Depth Blur settings effect how much the image is in or our of focus.
See Depth Blur

Depth Blur


See also