diff --git a/polymer/eduke32/source/astub.c b/polymer/eduke32/source/astub.c
index 2792f6756..3e6e0a2b2 100644
--- a/polymer/eduke32/source/astub.c
+++ b/polymer/eduke32/source/astub.c
@@ -127,8 +127,10 @@ static uint32_t templenrepquot=1;
 
 static int32_t duke3d_m32_globalflags;
 
-enum {
+// KEEPINSYNC global.h (used values only)
+enum DUKE3D_GLOBALFLAGS {
     DUKE3D_NO_HARDCODED_FOGPALS = 1<<1,
+    DUKE3D_NO_PALETTE_CHANGES = 1<<2,
 };
 
 //////////////////// Key stuff ////////////////////
@@ -9976,10 +9978,13 @@ void ExtPostInit(void)
 {
     InitCustomColors();
 
-    // Make base shade table at shade 0 into the identity map.
-    // (In the shade table of Duke3D's PALETTE.DAT, palookup[0][239]==143.)
-    // This makes it possible to sensibly use Lunatic's engine.saveLookupDat().
-    palookup[0][239] = 239;
+    if (!(duke3d_m32_globalflags & DUKE3D_NO_PALETTE_CHANGES))
+    {
+        // Make base shade table at shade 0 into the identity map.
+        // (In the shade table of Duke3D's PALETTE.DAT, palookup[0][239]==143.)
+        // This makes it possible to sensibly use Lunatic's engine.saveLookupDat().
+        palookup[0][239] = 239;
+    }
 
     if (!(duke3d_m32_globalflags & DUKE3D_NO_HARDCODED_FOGPALS))
         generatefogpals();
diff --git a/polymer/eduke32/source/game.c b/polymer/eduke32/source/game.c
index 0febae843..e5a2ae4c2 100644
--- a/polymer/eduke32/source/game.c
+++ b/polymer/eduke32/source/game.c
@@ -11002,18 +11002,24 @@ static inline void G_CheckGametype(void)
 
 static void G_PostLoadPalette(void)
 {
-    // Make color index 255 of default/water/slime palette black.
-    if (basepaltable[BASEPAL] != NULL)
-        Bmemset(&basepaltable[BASEPAL][255*3], 0, 3);
-    if (basepaltable[WATERPAL] != NULL)
-        Bmemset(&basepaltable[WATERPAL][255*3], 0, 3);
-    if (basepaltable[SLIMEPAL] != NULL)
-        Bmemset(&basepaltable[SLIMEPAL][255*3], 0, 3);
+    if (!(duke3d_globalflags & DUKE3D_NO_PALETTE_CHANGES))
+    {
+        // Make color index 255 of default/water/slime palette black.
+        if (basepaltable[BASEPAL] != NULL)
+            Bmemset(&basepaltable[BASEPAL][255*3], 0, 3);
+        if (basepaltable[WATERPAL] != NULL)
+            Bmemset(&basepaltable[WATERPAL][255*3], 0, 3);
+        if (basepaltable[SLIMEPAL] != NULL)
+            Bmemset(&basepaltable[SLIMEPAL][255*3], 0, 3);
+    }
 
     if (!(duke3d_globalflags & DUKE3D_NO_HARDCODED_FOGPALS))
         generatefogpals();
 
-    E_ReplaceTransparentColorWithBlack();
+    if (!(duke3d_globalflags & DUKE3D_NO_PALETTE_CHANGES))
+    {
+        E_ReplaceTransparentColorWithBlack();
+    }
 
     fillemptylookups();
 }
diff --git a/polymer/eduke32/source/global.h b/polymer/eduke32/source/global.h
index 9d2d2f4fe..252ca353c 100644
--- a/polymer/eduke32/source/global.h
+++ b/polymer/eduke32/source/global.h
@@ -57,9 +57,11 @@ extern "C" {
 
 G_EXTERN int32_t duke3d_globalflags;
 
-enum {
+// KEEPINSYNC astub.c (used values only)
+enum DUKE3D_GLOBALFLAGS {
     DUKE3D_NO_WIDESCREEN_PINNING = 1<<0,
     DUKE3D_NO_HARDCODED_FOGPALS = 1<<1,
+    DUKE3D_NO_PALETTE_CHANGES = 1<<2,
 };
 
 G_EXTERN DukeStatus_t sbar;