The book is a practical guide to developing cross-platform shaders written in the OpenGL Shader Language (GLSL) for use on Windows and Linux operating systems with various versions of the OpenGL library, which has become the standard in computer graphics training around the world. It was the use of shaders in a number of recent computer games that made it possible to implement complex and impressive effects in real time. The use of the RenderMonkey package for writing and debugging GLSL shaders is considered, allowing you to create a wide class of effects.