Tick marks don't scale in graphics -- why, and how to fix this?

Question

As we rasterize 3D images at higher and higher resolution, 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?

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Illustration:

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

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

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

Click here to see the output (too big to be conveniently inlined)

Answer 1

See http://reference.wolfram.com/mathematica/ref/Ticks.html "More information" and "Application" sections. You can specify tick length like this: