Hi, We have an application based on Qt and Vtk. It runs well on VTK8.1 However, after upgrading to VTK8.2, we experience problems when we first call vtkRenderer::Render(). This call ultimately ends up calling vtkOpenGLState::CheckState, and this fuction emits a lot of error messages which are liste…

Mathieu, Thanks, I found the answer there: // Make sure that the widget context is valid before making OpenGL calls. // This should only take up to 4 calls to processEvents(). If this test keeps // timing out, consider that the widget initialization is broken. while (!_qvtkWidget->isValid()) { …

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OpenGL state errors with QVTKOpenGLWidget and vtk8.2