diff --git a/src/textures/animations.cpp b/src/textures/animations.cpp
index 74f9b1f55..f46289f07 100644
--- a/src/textures/animations.cpp
+++ b/src/textures/animations.cpp
@@ -161,6 +161,16 @@ FAnimDef *FTextureManager::AddComplexAnim (FTextureID picnum, const TArray<FAnim
 // [RH] Rewritten to support BOOM ANIMATED lump but also make absolutely
 //		no assumptions about how the compiler packs the animdefs array.
 //
+// Since animdef_t no longer exists in ZDoom, here is some documentation
+// of the format:
+//
+//   This is an array of <n> entries, terminated by a 0xFF byte. Each entry
+//   is 23 bytes long and consists of the following fields:
+//     Byte      0: Bit 1 set for wall texture, clear for flat texture.
+//     Bytes   1-9: '\0'-terminated name of first texture.
+//     Bytes 10-18: '\0'-terminated name of last texture.
+//     Bytes 19-22: Tics per frame (stored in little endian order).
+//
 //==========================================================================
 
 CVAR(Bool, debuganimated, false, 0)
diff --git a/wadsrc/static/animated.lmp b/wadsrc/static/animated.lmp
deleted file mode 100644
index 100c804c8..000000000
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diff --git a/wadsrc/static/filter/game-doomchex/animated.lmp b/wadsrc/static/filter/game-doomchex/animated.lmp
new file mode 100644
index 000000000..016ce1fa3
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diff --git a/wadsrc/static/filter/game-heretic/animated.lmp b/wadsrc/static/filter/game-heretic/animated.lmp
new file mode 100644
index 000000000..80102c88e
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diff --git a/wadsrc/static/filter/game-strife/animated.lmp b/wadsrc/static/filter/game-strife/animated.lmp
new file mode 100644
index 000000000..ca656cfc3
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