Qolelis
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"Invisible" water surface:
NOin.pcx
NOout.pcx

TSWQND ("Quick'n'Dirty") (I had to use pcx, because GIMP insisted on optimizing the palette for gifs):
black.pcx (a black texture)
tomb3.pcx, tomb4.pcx (taken from stock Sarcophagus (-199))
sndstn01t.pcx (edited stock sndstn01.pcx)