[vtkusers] seams between transparent surfaces

[Paul Hamill]

Hi -

We're using VTK called from Python to create climate data visualizations. A 
structured mesh is divided into sub-meshes or "tiles" to support 
parallelization. We are seeing "seams" between meshes when they have alpha 
transparency. The attached screenshot is a simplified example of this. There are 
two adjacent pairs of planar surfaces. When viewed from some angles a polygonal 
shape appears where the surfaces meet. (Here it looks like a wide line running 
across the middle of the front plane.) The Python code that generates this image 
is also attached. Run "python exSeamProblem.py" to create this image and rotate 
it to see the seam.

Any advice or information about this problem is much appreciated.

Thanks -
Paul
-- 
    Paul Hamill
    Tech-X Corp
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