EXTR3DS.EXE 3ds data extract utility
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EXTR3DS.EXE is a utility to extract 3D Studio keyframer track data
from .3ds files and write it to file, EXT files. The idea is to make
one .3ds file with all the objects and several other files (EXT files)
that contain keyframer data that the demosystem (DSYS.EXE) can merge.

Use: extr3ds [params...] infile.3ds outfile.ext
 -s key                Start key (0...65535)
 -e key                End key (0...65535)
 -nopvt                Don't extract object pivot point
 -noof                 Don't extract object flags
 -nootf                Don't extract object track flags
 -nocf                 Don't extract camera flags
 -noctf                Don't extract camera track flags
 -notulkkisanakirja    Don't display tulkkisanakirja
 -y                    Don't ask for file overwrite
 -v                    Verbose mode on