glslViewer color_lut.frag assets/danny.png assets/square_01.png -w 1080 -h 1080 --headless -E screenshot,images/color_lut.jpg glslViewer color_dither.frag -w 1080 -h ...
"""Example: single-ray prism refraction. This example traces one ray through a two-face prism at three wavelengths and prints the deviation information used to estimate refractive index behavior.