These turrets seen on RA3 wallpaper. Strangely they did not appeared in final game, despite all these defence line look good and could be a real challenge for Allied and Imperial commanders.
My UV mapping skills still far from perfect, but model should look ok in game.
I believe EA ditch it due to the current social-political time we live at, that wallpaper can have some Nazi vibes into it and seeing the final product, it seem that EA didn't try to take any chances at all and made the toybox we have today