Customized cockpit and Shkval

I am trying to modify Ka-50 cockpit textures using description.lua generated by edmodelviewer2.

However, which ever I texture I modify and implement through Customized cockpit option, Shkval stops working. There is no camera feed or indications/symbols on screen, just a reflection and a slight change of brightness when turning it on or off.

Shkval works with default cockpit textures.

Have tried using different individual textures, restarting the game each time, but the result is the same.

Any help would be appreciated.

Maybe you have to create a transparency with alpha channel on the Shkval monitor location.