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Tick marks don't scale proportionally with other elements of the

Note: cross posted to
See that link for graphics.

Dear MathGroup members,

As we rasterize 3D images at higher and higher resolutions, every image 
element should get proportionally bigger and bigger. However, tick marks 
stop growing after a while. Is there a way to ensure that tick marks 
should grown proportionally to the rest of the graphic, like text does?

Evaluate this code to see an illustration of the problem:

g = Graphics3D[Sphere[], Axes -> True, ImageSize -> 200]

   ImageResize[Rasterize[g, "Image", ImageResolution -> n 72],
    Scaled[1/n]], Magnification -> 1], {n, 6}]

    Image[Rasterize[g, "Image", ImageResolution -> n 72],
          Magnification -> 1],
    {n, 6}], Alignment -> Left]

(warning: produces large images as output!)

Szabolcs Horvát
Mma QA site proposal:

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