problem saving openGL FBO larger than window

Question

I\'m rendering into an OpenGL offscreen framebuffer object and like to save it as an image. Note that the FBO is larger than the display size. I can render into

Answer 1

You're not doing anything wrong, this has been quite common behaviour with OpenGL graphics drivers for a long time - I recall running up against exactly the same issue on nVidia Geforce 3 cards at least a decade ago, and I adopted a similar solution - rendering to an offscreen texture.