diff --git a/polymer/eduke32/build/include/editor.h b/polymer/eduke32/build/include/editor.h
index 1f427ee72..7582dfcb2 100644
--- a/polymer/eduke32/build/include/editor.h
+++ b/polymer/eduke32/build/include/editor.h
@@ -253,6 +253,7 @@ static inline int32_t get_nextloopstart(int32_t loopstart)
 extern int32_t corruptlevel, numcorruptthings, corruptthings[MAXCORRUPTTHINGS];
 extern int32_t autocorruptcheck;
 extern int32_t corruptcheck_noalreadyrefd, corruptcheck_heinum;
+extern int32_t corruptcheck_game_duke3d;
 extern int32_t corrupt_tryfix_alt;
 extern int32_t CheckMapCorruption(int32_t printfromlev, uint64_t tryfixing);
 
diff --git a/polymer/eduke32/build/src/config.c b/polymer/eduke32/build/src/config.c
index 91c0c7253..0a64fe59d 100644
--- a/polymer/eduke32/build/src/config.c
+++ b/polymer/eduke32/build/src/config.c
@@ -209,6 +209,8 @@ int32_t loadsetup(const char *fn)
     if (readconfig(fp, "autocorruptchecksec", val, VL) > 0) autocorruptcheck = max(0, atoi_safe(val));
     if (readconfig(fp, "corruptcheck_noalreadyrefd", val, VL) > 0)
         corruptcheck_noalreadyrefd = !!atoi_safe(val);
+    if (readconfig(fp, "corruptcheck_game_duke3d", val, VL) > 0)
+        corruptcheck_game_duke3d = !!atoi_safe(val);
     if (readconfig(fp, "corruptcheck_heinum", val, VL) > 0)
         corruptcheck_heinum = clamp(atoi_safe(val), 0, 2);
     if (readconfig(fp, "fixmaponsave_sprites", val, VL) > 0)
@@ -490,6 +492,9 @@ int32_t writesetup(const char *fn)
              "; Ignore 'already referenced wall' warnings\n"
              "corruptcheck_noalreadyrefd = %d\n"
              "\n"
+             "; Flag Duke3D issues\n"
+             "corruptcheck_game_duke3d = %d\n"
+             "\n"
              "; Auto-correct inconsistent ceilingstat/floorstat bit 2 and .heinum?\n"
              "; Set to 2, also warn on 'corruptcheck'.\n"
              "corruptcheck_heinum = %d\n"
@@ -626,7 +631,8 @@ int32_t writesetup(const char *fn)
              msens, unrealedlook, pk_uedaccel, quickmapcycling,
              sideview_reversehrot,
              revertCTRL,scrollamount,pk_turnaccel,pk_turndecel,autosave,autocorruptcheck,
-             corruptcheck_noalreadyrefd, corruptcheck_heinum, fixmaponsave_sprites, keeptexturestretch,
+             corruptcheck_noalreadyrefd, corruptcheck_game_duke3d,
+             corruptcheck_heinum, fixmaponsave_sprites, keeptexturestretch,
              showheightindicators,showambiencesounds,pathsearchmode,
              m32_2d3dmode,m32_2d3dsize,m32_2d3d.x, m32_2d3d.y,
              autogray, //showinnergray,
diff --git a/polymer/eduke32/source/astub.c b/polymer/eduke32/source/astub.c
index 88146eee1..f785a04af 100644
--- a/polymer/eduke32/source/astub.c
+++ b/polymer/eduke32/source/astub.c
@@ -8634,6 +8634,14 @@ static int32_t osdcmd_vars_pk(const osdfuncparm_t *parm)
         return OSDCMD_OK;
     }
 
+    if (!Bstrcasecmp(parm->name, "corruptcheck_game_duke3d"))
+    {
+        corruptcheck_game_duke3d = !corruptcheck_game_duke3d;
+        OSD_Printf("%s Duke3D issues\n",
+                   !corruptcheck_game_duke3d?"Ignore":"Regard");
+        return OSDCMD_OK;
+    }
+
     if (!Bstrcasecmp(parm->name, "corruptcheck_heinum"))
     {
         if (parm->numparms > 1)
@@ -9083,6 +9091,7 @@ static int32_t registerosdcommands(void)
     OSD_RegisterFunction("show_heightindicators", "show_heightindicators {0, 1 or 2}: sets display of height indicators in 2D mode", osdcmd_vars_pk);
     OSD_RegisterFunction("show_ambiencesounds", "show_ambiencesounds {0, 1 or 2}: sets display of MUSICANDSFX circles in 2D mode", osdcmd_vars_pk);
     OSD_RegisterFunction("corruptcheck_noalreadyrefd", "corruptcheck_noalreadyrefd: toggles ignoring of one-to-many red wall connections", osdcmd_vars_pk);
+    OSD_RegisterFunction("corruptcheck_game_duke3d", "corruptcheck_game_duke3d: toggles ignoring of Duke3D issues", osdcmd_vars_pk);
     OSD_RegisterFunction("corruptcheck_heinum", "corruptcheck_heinum: toggles auto-correcting inconsistent c/fstat bit 2 and heinum (2: also warn)", osdcmd_vars_pk);
     OSD_RegisterFunction("keeptexturestretch", "keeptexturestretch: toggles keeping texture stretching when dragging wall vertices", osdcmd_vars_pk);
 
diff --git a/polymer/eduke32/source/m32common.c b/polymer/eduke32/source/m32common.c
index 2f5de4047..66f9bbd3b 100644
--- a/polymer/eduke32/source/m32common.c
+++ b/polymer/eduke32/source/m32common.c
@@ -45,6 +45,7 @@ int32_t autosave=180;
 
 int32_t autocorruptcheck;
 int32_t corruptcheck_noalreadyrefd, corruptcheck_heinum=1;
+int32_t corruptcheck_game_duke3d=1;  // TODO: at startup, make conditional on which game we are editing for?
 int32_t corrupt_tryfix_alt;
 int32_t corruptlevel, numcorruptthings, corruptthings[MAXCORRUPTTHINGS];
 
@@ -1302,6 +1303,30 @@ end_wall_loop_checks:
             CORRUPTCHK_PRINT(0, CORRUPT_SPRITE|i, "SPRITE[%d].PICNUM=%d out of range, resetting to 0", i, TrackerCast(sprite[i].picnum));
         }
 
+        if (corruptcheck_game_duke3d)
+        {
+            const int32_t tilenum = sprite[i].picnum;
+
+            if (tilenum >= 1 && tilenum <= 9 && (sprite[i].cstat&48))
+            {
+                const int32_t onumct = numcorruptthings;
+
+                CORRUPTCHK_PRINT(1, CORRUPT_SPRITE|i, "%s sprite %d is not face-aligned",
+                                 names[tilenum], i);
+
+                if (onumct < MAXCORRUPTTHINGS)
+                {
+                    if (tryfixing & (1ull<<onumct))
+                    {
+                        sprite[i].cstat &= ~(32+16);
+                        OSD_Printf(CCHK_CORRECTED "auto-correction: cleared sprite[%d].cstat bits 16 and 32\n", i);
+                    }
+                    else if (1 >= printfromlev)
+                        OSD_Printf("   suggest clearing sprite[%d].cstat bits 16 and 32\n", i);
+                }
+            }
+        }
+
         if (klabs(sprite[i].x) > BXY_MAX || klabs(sprite[i].y) > BXY_MAX)
         {
             const int32_t onumct = numcorruptthings;