/usr/share/libavogadro/shaders/x-ray.params is in avogadro-data 1.2.0-1+deb9u1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 | vec3 color 0.482353 0.956863 0.917647
float da 0
vec3 eyePosition 0 0 0
float maxOpacity 1
float minOpacity 0
|