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zennode (node builder for Doom and related games)
-Note: the ZenNode "compare" utility is installed as /usr/bin/zn-compare,
-to avoid conflicting with /usr/bin/compare from the imagemagick package.
+ZenNode will read the level description from a .WAD file and create
+either a new BLOCKMAP resource, REJECT resource, and/or NODES, SEGS,
+SSECTOR resources. Levels in a .WAD may be specified on the command
+line, or, if none are specified, all of the maps in a .WAD will be
+rebuilt.
+
+ZenNode supports Doom, Doom II, Heretic, Hexen, and Strife.
+
+Notes:
+
+- ZenNode does NOT create GL nodes. Use glbsp or zdbsp for that.
+
+- The ZenNode compare utility is installed as /usr/games/zn-compare,
+ to avoid conflicting with /usr/bin/compare from ImageMagick.