Who invented ray tracing?

@article{Hofmann2005WhoIR,
  title={Who invented ray tracing?},
  author={G. R. Hofmann},
  journal={The Visual Computer},
  year={2005},
  volume={6},
  pages={120-124}
}
We provide some remarks on the very early developments of the visualization techniques conducted during the European Renaissance. It is shown that the basic principle of ray tracing was already presented by Albrecht Dürer (1471–1528) in 1525. This article is intended to be of common interest; it is not a scientific report. 
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