[Paraview] paraview3beta: isosurface coloring and transparency

[W. Bryan Smith]

On 5/8/07, Berk Geveci <berk.geveci at kitware.com> wrote:
>
> Ouch! That is some seriously complicated geometry!


yes, i am working with biologists... complex is the name of the game!

I think you are
> running into the limitations of the depth-peeling algorithm that is
> used to render transparent geometry. You can try to increase some of
> these limits by recompiling ParaView. In the source code, you have to
> edit VTK/Rendering/vtkRenderer.cxx and change MaximumNumberOfPeels on
> line 119 to something higher, maybe 10-20. However, this will reduce
> rendering speed because each peel roughly corresponds to 1 render.



i am not sure this is the problem... when i look at the source for
vtkRenderer.cxx in ParaView2.6 and ParaView3, these fields are
exactly the same:

this->MaximumNumberOfPeels=4;

and the exact same dataset on the exact same machine appears
as expected in ParaView2.6 (i.e. without these raster artifacts).  or
is there something i am missing here?  i looked at the diff between
the two files, and there is a bunch of different stuff (version number
is 1.231 versus 1.233) including a bunch of calls where, in 1.231
there are references to "Render translucent geometry" that in ver
1.233 it says "Render translucent polygonal geometry".  these sorts
of things appear to make up a majority of the diff b/t the versions.  i
can post the diff if it will be useful (though i am sure everyone here
can easily generate it themselves).

thanks again,
bryan
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