<html><head></head><body><div style="font-family: Verdana;font-size: 12.0px;"><div>Hi community,</div>
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<div>I'm trying to render the "Shadows" example from VTK wiki (http://www.vtk.org/Wiki/VTK/Examples/Cxx/Visualization/Shadows).</div>
<div>However, not in a "standard" command line application setup, but integrated in a QGraphicsView / QVTKGraphicsItem.</div>
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<div>Unfortunately this does not appear to work as I was expecting - the following errors emerge:</div>
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<div>vtkFrameBufferObject (000000000840D790): The framebuffer is incomplete : FRAMEBUFFER_INCOMPLETE_DIMENSIONS</div>
<div>ERROR: In C:\dev-libs\VTK-6.1.0\Rendering\OpenGL\vtkOpenGLRenderer.cxx, line 1202<br/>
vtkOpenGLRenderer (00000000025266F0): failed after Clear 1 OpenGL errors detected<br/>
0 : (1286) Invalid framebuffer operation</div>
<div>ERROR: In C:\dev-libs\VTK-6.1.0\Rendering\OpenGL\vtkOpenGLDisplayListPainter.cxx, line 188<br/>
vtkOpenGLDisplayListPainter (00000000024FB490): failed after RenderInternal 1 OpenGL errors detected<br/>
0 : (1286) Invalid framebuffer operation</div>
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<div>I tried to debug the issue over the last days but was not able to find a solution so far ...</div>
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<div>I extracted a simple example (ShadowsQVTKView) where the issue is shown (see attached files).</div>
<div>The application launches a QMainWindow hosting a QGraphicsView, then a timer is started: at its first timeout (after 1 second) a simple scene is rendered (some sphere ...) and at its second timeout (after further 5 seconds) the adapted Shadows example from VTK wiki is rendered. Unfortunately, trying to render the second scene gives the above mentioned errors.</div>
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<div>I'm a bit desperate - hope you can help me to track down the issue!!</div>
<div>THANK YOU!</div>
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<div>Best,</div>
<div>Lars</div></div></body></html>