Hardware recommendations for quicker results?

[ioalexei]

I'm after some advice or input on hardware specs to get good results from Rayshader.

E.g. With my current setup to process a single SRTM tile, 3600 pixels square, takes around 20 minutes. (16gb ram, old intel xeon E5 processor)

Any recommendations on a minimum or recommended spec to get good results from this package?

Is there a rule of thumb for image size, processing power and/or RAM?