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<p class="MsoNormal"><span lang="EN-US">Maybe you’ve forgot to set the camera clipping range.</span></p>
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<p class="MsoNormal">Andras</p>
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<p class="MsoNormal" style="border:none; padding:0cm"><b>From: </b><a href="mailto:elvis.stansvik@orexplore.com">Elvis Stansvik</a><br>
<b>Sent: </b>May 26, 2016 08:29<br>
<b>To: </b><a href="mailto:vtkusers@vtk.org">VTK Users</a><br>
<b>Subject: </b>Re: [vtkusers] Glitch in rendering when using vtkGPUVolumeRayCastMapper in 7.0.0</p>
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<div class="gmail_quote">2016-05-26 14:01 GMT+02:00 Elvis Stansvik <span dir="ltr">
<<a href="mailto:elvis.stansvik@orexplore.com" target="_blank">elvis.stansvik@orexplore.com</a>></span>:<br>
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<div class="gmail_quote"><span class="">2016-05-26 13:46 GMT+02:00 Elvis Stansvik
<span dir="ltr"><<a href="mailto:elvis.stansvik@orexplore.com" target="_blank">elvis.stansvik@orexplore.com</a>></span>:<br>
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<div>Hi all,<br>
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When I view my volume from certain angles, there are glitches in the rendering when using vtkGPUVolumeRayCastMapper , see attached screenshots when the glitch is occurring and when it is not.<br>
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Has anyone seen this behavior and know what the problem might be? This is on Intel HD 4400 graphics.<br>
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<div>If it's not quite clear, the glitch is at the bottom of the first screenshot, where an are of the volume is not visible.<br>
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<div>An observation: I had the following to enable parallell projection in my code:<br>
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self.camera.ParallelProjectionOn()<br>
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<div>If I remove this line, so that perspective projection is used instead, the glitches disappear.<br>
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<div>This is not a solution, since I need to use parallell projection, but maybe it's a clue to the problem?<br>
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<div>Elvis<br>
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<div>From certain angles the volume disappears almost completely.<span class=""><font color="#888888"><br>
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<div>Elvis<br>
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I would love to be able to use the GPU volume mapper since it's so much faster than the software one.<br>
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Thanks,<br>
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Elvis<br>
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