If you look back to our picture as we left it on page 14, you can see that the sky has very few clouds, but the large cloudless area is not blue, but a rather unpleasant steely green. Also, there is a little too much pink on the foreground snow to be convincing. I wanted to correct these faults, and if possible put clouds on the sun side of the picture, where they would glow attractively, and leave some blue sky visible too. I wanted larger clouds, and I wanted them to be pinkish against the blue sky.

These are the settings I changed from the defaults.

Cloud generator
3d clouds (for the best rendering of the sky). Depth/thickness 15 (to give the clouds bulk). Cloud colour R=192 G=128 B=128 (to give the dark parts of the clouds a pinkish tinge). On the generate clouds menu, largest cloud size maximum -3, moving the slider one position to the right of the default (to give larger clouds).

Atmosphere generator
Simple haze had already been changed by changing the cloud colour on the cloud generator. Light decay/red unlocked from atmospheric blue. Atmospheric blue colour R=10, G=40, B=256 (to increase the blue in the colour. Since blue was already at the maximum I had to do this by decreasing red and green). Atmospheric blue density=40% (again to increase the blue in the sky and to remove some pink from the reflections on the snow.)

No other settings were changed from the ones already set at the last rendering of the picture.

I had to generate clouds several times before getting them in the position that I wanted. On the render control render settings menu, both accuracy settings (atmosphere and cloud shading) were set to maximum. The final render, size 600 x 450 pixels, took 3hours and 54 minutes.

The final picture



The tutorial will be added to and/or updated with each new issue of Terragen. The current version is 0.6.51 (1999)


I am grateful for the help of the following in the preparation of this tutorial:
Matthew Fairclough, author of Terragen, for technical advice, especially about the areas where I had not fully understood the working of the program.
Willy, for testing and proof reading, and finding my spelling mistakes, typing errors, and the places where the instructions were not clear.
Those users of the tutorial, too many to mention individually, whose encouragement and suggestions helped to keep my nose to the grindstone. If you wrote to me, or left a message in a forum or list, I thank you here.


Carol Brooksbank. 1999