Background - Colors, Bitmaps or a Complex Atmosphere  
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How to put a picture or a simple color range in the background on rendering or rather generate a complex atmosphere with fog, clouds and a colorful sky.  
 
·The Background Dialog  
Structure of the dialog, preview options and the background library  
 
The individual background models :  
 
·Simple Color Range  
Draw a simple color range in the background  
 
·Atmosphere  
How to simulate a complex atmosphere  
Sky Colors - Two different approaches for rendering sky graduations  
Atmospheric Filter - Why turns the sky red at sunset?  
Clouds - Adding cloud layers to the atmosphere  
Fog - Atmospheric fog and volumetric ground fog  
Rainbow - The phenomenom of caustic light reflections in the atmosphere  
Rain/Snow/Floating Particles - At the touch of a button it begins to rain or snow  
Stars - Use the starfield as part of the background model or alternatively as an animated starfield for space travel.  
 
·Background Bitmap  
Copy a bitmap in the background