It is likely that the trenches or tunnels on BFV (I never actually had the game) were static objects made up and inserted into the environment. The same could theoretically be done for BF1942, but it's a lot of work just to ask someone to make some for you.
how do you dig into a cliff? I have the trench / cave patch for BFV and the ground does not overlap the static, can anyone make a trench and underground bunker for me? im tired of painting the ground