I'm quite sure I'm using Indie License of Unity3D, and that this isn't at all the Pro Evaluation(Trial) version. However, in the Editor GUI, I am able to call GL.Begin(), and GL.End(), as well as GL.Vertex3f()..
From what I've read, this is a PRO-ONLY feature, however it's working quite well for me.. While, RenderToTexture is not. Is this a bug? Or is it acceptable to use it in indie, as long as it is used within editors?