The aspect ratio being 1 means that both axes have an equal zoom value. Output from Shadow looks fine with the grayscale map. Note that the CombineBitmaps trick does not allow for interpolated images or resampling of data. You can look at the color tables used with the CombineBitmaps outputs to get an idea how this trick works and develop your own using the Color Table Editor in View. A sample run The lines below contain the screen output from successive runs of TopoToAlbersFull , Shadow, and MergeBitmaps to illustrate the use of these codes.
Files mentioned are in the archive release of the codes.