The height and width of the image represent the number of pixels that will fill the rendering window.Note that this is independent of the size of the window.The image will be stretched or shrunk so that the given number of pixels fill the window.Very small image height and width values will lead to a very grainy picture in a large rendering window, but will look just fine in a small rendering window.
You can retrieve the current height and width values using the following functions:
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