title: Good introduction to OpenGL?
body: <p>I'm interested in learning about rendering and "the whole 2D/3D stuff", especially in OpenGL/C#. There are thousands of search results on Google, so I was wondering if you have any recommendations which to pick, and how to approach the issue - is it possible to become proficient without a teacher? - Are there great books on the topic?</p>
  
  <p>My background: I have been programming in C++/Java/C# for years. I got basic math skills but lack knowledge once it comes to basic university level. The reason for digging into this topic is a company project as well as personal interest.</p>