Code: Select all
./gzdoom.exe -iwad wads/DOOM2.WAD +map map01 -stdout
The second level load is visible if the the level happens to look different the second time around -- that is, you're already in place at the spawn point, seeing the first iteration of the map, when it loads again.
There might be a very fatal error associated with this in some cases.
Tested in 32bit DRD nightly build from last night.