I'm not
that familiar with ROTT level making, but in Wolfenstein, each tile of the map had a value for the type of floor. This was used for the sound that would alert guards. If a shot was fired and you were on the same floor type as a guard, it would "hear" it. This was later coded so that the different floor types would also render a floor and ceiling you can see this in the game you mentioned, and Wolfenstein/Spear mods like AReyeP's Spear: End of Density.
If the ROTT floor tile workings are the same, in theory... It shouldn't be that hard to code a hack. Otherwise, I don't really know what to tell you.
