Here's an example code snippet from the tutorial series, demonstrating how to create a simple OpenGL 4 program:

Initializing OpenGL 4, creating shaders, and using VBOs.

Phong lighting models, normal mapping, cube maps, and environment mapping.

The answer lies in structure and depth.

: Normal mapping, environment mapping (cube maps), and gamma correction.

OpenGL 4 is a graphics API developed by the Khronos Group, a consortium of companies including Apple, NVIDIA, and AMD. It is designed to provide a high-level interface for rendering 2D and 3D graphics on a variety of platforms, including Windows, macOS, and Linux. OpenGL 4 is a shader-based API, which means that developers can write custom shaders to control the rendering pipeline.