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= What is a Shader =
 
= What is a Shader =
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A shader is a programmable replacement for parts of the fixed function OpenGL pipeline.
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Shaders offer:
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* Opportunity for Improved Visual Quality
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* Algorithm Flexibility
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* Performance Benefits
    
To make it simple, a shader is a program that is loaded on the GPU and called for every vertex or pixel: this gives programmers the possibility to implement techniques and visual effects and execute them faster. In modern games or simulators lots of shaders are used: lights, water, skinning, reflections and much more.  
 
To make it simple, a shader is a program that is loaded on the GPU and called for every vertex or pixel: this gives programmers the possibility to implement techniques and visual effects and execute them faster. In modern games or simulators lots of shaders are used: lights, water, skinning, reflections and much more.  
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