You can import Metro Redux maps into 3DSMax, possibly Maya -- but I haven't tried with Maya.
Make sure you have the importer tools for your relative software.
For this, you'll simply have to unpack the game yourself.
After unpacking the game, browse to the folder made by the unpacker, i.e:
content\maps\2033 or your respective game that you've chosen
Simply pick your level and import the .geom_pc file in 3DSMax.
One full map.