https://bugs.winehq.org/show_bug.cgi?id=38480
--- Comment #8 from Alex Henrie alexhenrie24@gmail.com --- Actually, there is another solution: RuneScape could try to use glCopyTexSubImage3D from OpenGL 4.0 and then fall back to glCopyTexSubImage3DEXT only if OpenGL 4.0 or later is not available.