WorldBuilder 4 Basics: Part 4, Haze Filter

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WorldBuilder 4 Basics: Part 4, Haze Filter

The Haze filter simulates light scattered in the atmosphere. Since the blue component scatters more, the color of the sky is blue; distant objects have a blue tint in a clear atmosphere. We can describe how the air scatters the light by specifying the distance at which the light intensity will be reduced to half of its original value. With independent Half Transparency Distance for each of the color components, you can set scattering of the blue component to a higher value (shorter Half Transparency Distance) to produce more realistic results.

We need to 'push' the Haze away from the Camera.

Let's increase the Half Transparency Distance for all 3 color channels by a factor of 4.

Knowing the size of the Landscape object (1000 meters on a side) helps us to pick a good first approximation for these parameters.

Let's re-render the scene again.

Although we are getting closer to a light haze on a sunny day, we lost some of the contrast and bright colors of the original image.

We can compensate for this by applying the RGB Levels filter. It works in a similar manner to Photoshop's Autolevels filter.

In the Object Tree select Scene again. Right-click on Filters and select Add. Select RGB Levels.

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