In the second one, there is little blue sky left, but the clouds themselves are rather too blue now, and even though I have reduced the blue content of the cloud colour now to 55, we should really, for a more realistic picture, now reduce the blue in atmospheric blue on the atmosphere controller. We have already changed the simple haze colour, because in the current version of Terragen simple haze is used for the cloud colour, and changing one changes the other. Taking density shift to negative values will reduce the number of clouds in the sky. On the left is the render at density shift -15. At -100, seen on the right, we get a cloudless blue sky.
Density contrast changes the contrast between the light and dark areas of the clouds.
Increasing the density contrast will also increase the percentage of clouds in the sky. These very contrasty clouds are particularly useful in scenes where the sun is in or near the picture and the glow factors are higher. If the colour contrast is required without an increase in cloud coverage, the density shift slider is taken to a minus figure to remove some. The update view button applies changes in parameters to the existing cloud pattern. The generate clouds button allows a new pattern of clouds to be produced.