[CS] - rain texture shades specular incoming light only in a fixed direction

Created by: BielBdeLuna

Describe the bug in rainy circumstances all specular highlights seem to have a fixed direction instead of confronting the camera direction according to the surface normal.

To Reproduce

1. wait for rain at night
2. turn on the flashlight
3. look at models that you can circle around an that are wet
4. circle around models, the error should become obvious

Expected behavior specular highlights should relate to the normal direction of the surface and the normal-map, not a fixed direction!

Screenshots the flashlight is on, the floor and the cement tube light in a strange way looking roughly from west to east https://ibb.co/T1hDBWZ

looking from east to west (take a look to the compass in the minimap) the floor lights correctly, as well as the cement tube https://ibb.co/9cPxWPW

and here is proff: since the interior of the cement tube is not wet the specular-diffuse light works correctly, take a look at the shadows inside the tube, it proves a light is being shone upon that, but judging for the exterior (that is wet) and the floor (wet too) it seems the light comes from underneath https://ibb.co/p1QthcG

something is amiss here

BugTrap error report none.

Desktop (please complete the following information):

• OS: [Ubuntu 21.10]
• OpenXRay build version [f77babc8]

Additional context no special operation here.