[vtkusers] big sphere radius not working

[Bruno Oliveira]

Hello,

I am tryint to create a sphere with a huge raidius (3e6).

I use this code:

// Create a sphere with texture coordinates
    vtkSmartPointer<vtkTexturedSphereSource> source = vtkSmartPointer<
            vtkTexturedSphereSource>::New();
    source->SetRadius(radius);
    source->SetThetaResolution(1000);
    source->SetPhiResolution(100);


this code works if I use a small raiuds (like 2), but if i set a big radius
value (like 3e6), it won't work: the rendered image is all black. Why could
this be happening?
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