RVMAT "Material - Basic glass reflectance" does not test Z buffer. Mesh rendered partially in terrain is visible and has a strobe effect on lighting.
renderFlags[] setting in RVMAT file has no option for Enable/Disable Z Buffer test, only Z Buffer write ("NoZWrite").
RVMAT Basic Glass setting:
Simple Glass With Reflectance
Use default setting in RVMAT file for 'Basic glass reflectance'.
Simple Glass With Reflectance
Apply to faces of P3D object and spawn partially in Terrain.
Above terrain renders correctly.
Below terrain faces render visible (no z buffer test) and have a strobing light effect.
RVMAT renderFlag settings has no option to disable Z buffer test.
Have extremely high desire for "NoZBuffer" option in RVMAT file 'renderFlag[]' setting. So faces could render with no Z buffer test but write to the Z buffer. This feature would make cutting holes in terrain or any mesh object possible and allow placing underground entrance anywhere on a map, including vanilla Chernarus and Livonia. On terrain or interior.
Hello Gaz6.
According to devs you are not supposed to use basic materials in this case. Use super shader for general purpose, multishader for buildings.
Basic is broken and no longer supported.