Eyesight
Eyesight is the 3D renderer integrated into BrickLink Studio for creating photorealistic images.
(Another renderer integrated in that tool is POV-Ray.)
Eyesight is a command-line tool spawned by Studio when you are triggering a rendering from its user interface. It can be run standalone manually if you specify the correct options.
To see a list of all available options, invoke it from the command line with this parameter:
eyesight.exe --help
Note that that executable can be find in a subfolder e.g. PhotoRealisticRenderer\win\64.