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I produced an image that combines a couple of objects by using the following command

Fig = Show[a1, a2, ar1, ar2, springnew, PlotRange -> All, 
BoxRatios -> Automatic, ViewPoint -> {1.23, -1.90, -2.5}, 
Boxed -> False, Axes -> False, ImageSize -> {400, 300}]

Here is how image looks like,

Original figure

But when I export it as a png file,

Export["Fig.png", Fig, ImageResolution -> 500]

This is how the save file looks like,

saved figure

The two images seem flipped upside down, at least from different views. But I did specify the viewpoint when I produce the image. I'm sure it's not due to the ImageResolution option in the export command. The save image looks the same even I turned off the option.

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    $\begingroup$ Could you include the complete minimal code that is needed to reproduce the issue? $\endgroup$ – Jens Jul 18 '17 at 23:18
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    $\begingroup$ It could be that you have changed the orientation by hand at some point. When re-rendering, Mathematica remembers some things like that, so it may not show the image that the code generates. You can delete the image and re-render it without any previous output to see what the code actually says it looks like, if this is the problem. $\endgroup$ – C. E. Jul 18 '17 at 23:39
  • $\begingroup$ might try the Export option "ImageTopOrientation" ->Bottom or "ImageTopOrientation" ->Top. $\endgroup$ – kglr Jul 18 '17 at 23:46
  • $\begingroup$ @kglr I tried both, but neither worked. But for Top, it seems the view is from the back. $\endgroup$ – ruima86 Jul 19 '17 at 0:35
  • $\begingroup$ @C.E. I deleted the image and rerun the code, but still didn't solve the problem. $\endgroup$ – ruima86 Jul 19 '17 at 0:36

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