How can I compare the screenshot and material quality of my own model to that of the Google Model Viewer’s render fidelity tool?

Questions
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1

For screenshot comparison and material quality checks, we use imagemagick. So, my concern is: Is it worthwhile to use the render fidelity tool in Google Model Viewer for the same purpose, or is imagemagick a better option?

2

Just use image magic…the results are better…but it is harder and not as user friendly as google is