<div dir="ltr">A couple of observations:<div><br></div><div>1) for surface rendering with color mapped array, vtk's OSPRay interface we does not yet respect transparency (either at the actor level or in the alpha channel of the colormap). If you use a solid color for the entire actor (PV GUI color choice is "Solid Color" instead of one of the arrays in the data) then we do respect opacity.<br></div><div><br></div><div><div>2) we turn on aoTransparencyEnabled whenever there are volumes in the scene</div><div><a href="https://gitlab.kitware.com/vtk/vtk/blob/master/Rendering/OSPRay/vtkOSPRayRendererNode.cxx#L870">https://gitlab.kitware.com/vtk/vtk/blob/master/Rendering/OSPRay/vtkOSPRayRendererNode.cxx#L870</a><br></div><div>If your scene doesn't have volumes in it, then you'll need to compile from source and enable that generally (remove the if conditon).</div><div><br></div><div>Feel free to submit patches or bug reports to for either of those things to help us remember to improve them.</div><div><br></div><div><br></div><div><br></div></div><div><br></div><div><br></div></div><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div>David E DeMarle<br>Kitware, Inc.<br>Principal Engineer<br>21 Corporate Drive<br>Clifton Park, NY 12065-8662<br>Phone: 518-881-4909</div></div></div></div></div></div>
<br><div class="gmail_quote">On Thu, Sep 7, 2017 at 2:57 AM, Stefano Capra <span dir="ltr"><<a href="mailto:steve.capra@gmail.com" target="_blank">steve.capra@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Good morning,<br>
I am running ParaView 5.4.1-Qt5-OpenGL2-Windows-<wbr>64bit and I was wondering if there is a way to activate the opacity rendering while using OSPRay ambient occlusion<br>
<br>
In the OSPRay website I have found this:<br>
"New SciVis renderer parameter aoTransparencyEnabled, controlling whether object transparency is respected when computing ambient occlusion (disabled by default, as it is considerable slower)"<br>
<br>
However I am not sure how to change that parameter in ParaView<br>
<br>
Thanks<br>
SC<br>
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