[vtkusers] vtkOpenGLExtensionManager bug?

[Maarten Beek]

Hi all,
vtkOpenGLExtensionManager::GetDriverGLVersion() returns:"3.1.0 - Build 9.17.10.3517
vtkOpenGLExtensionManager::GetDriverGLRenderer() returns:"Intel(R) HD Graphics 3000"

However, as soon as my app tries to render a vtkSmartVolumeMapper, it complains:"Error: In <snip>\vtkOpenGLExtensionManager.cxx, line 757vtkOpenGLExtensionManager (<snip>): Extension GL_VERSION_1_2 could not be loaded."
What is going on here? And is there an easy way to avoid this (would a simple CPU ray caster do the trick)?
Thanks - Maarten

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