diff --git a/source/build/include/build.h b/source/build/include/build.h
index 9d0b64860..25155e922 100644
--- a/source/build/include/build.h
+++ b/source/build/include/build.h
@@ -668,6 +668,9 @@ EXTERN int32_t xdim, ydim, numpages, upscalefactor;
 EXTERN int32_t yxaspect, viewingrange;
 EXTERN intptr_t *ylookup;
 
+EXTERN int32_t rotatesprite_y_offset;
+EXTERN int32_t rotatesprite_yxaspect;
+
 #ifndef GEKKO
 #define MAXVALIDMODES 256
 #else
diff --git a/source/build/src/baselayer.cpp b/source/build/src/baselayer.cpp
index 33b9f6743..b23b1ae89 100644
--- a/source/build/src/baselayer.cpp
+++ b/source/build/src/baselayer.cpp
@@ -118,6 +118,8 @@ int32_t mouseReadAbs(vec2_t * const pResult, vec2_t const * const pInput)
     pResult->x = scale(pInput->x, xwidth, xres) - ((xwidth>>1) - (320<<15));
     pResult->y = scale(pInput->y, 200<<16, yres);
 
+    pResult->y = divscale16(pResult->y - (200<<15), rotatesprite_yxaspect) + (200<<15) - rotatesprite_y_offset;
+
     return 1;
 }
 
diff --git a/source/build/src/engine.cpp b/source/build/src/engine.cpp
index d4e397f8a..abac8d505 100644
--- a/source/build/src/engine.cpp
+++ b/source/build/src/engine.cpp
@@ -6379,6 +6379,8 @@ void dorotspr_handle_bit2(int32_t *sxptr, int32_t *syptr, int32_t *z, int32_t da
         int32_t zoomsc, sx=*sxptr, sy=*syptr;
         int32_t ouryxaspect = yxaspect, ourxyaspect = xyaspect;
 
+        sy += rotatesprite_y_offset;
+
         // screen center to s[xy], 320<<16 coords.
         const int32_t normxofs = sx-(320<<15), normyofs = sy-(200<<15);
 
@@ -6393,6 +6395,9 @@ void dorotspr_handle_bit2(int32_t *sxptr, int32_t *syptr, int32_t *z, int32_t da
             ourxyaspect = (10<<16)/12;
         }
 
+        ouryxaspect = mulscale16(ouryxaspect, rotatesprite_yxaspect);
+        ourxyaspect = divscale16(ourxyaspect, rotatesprite_yxaspect);
+
         // nasty hacks go here
         if (!(dastat & RS_NOCLIP))
         {
@@ -6414,6 +6419,7 @@ void dorotspr_handle_bit2(int32_t *sxptr, int32_t *syptr, int32_t *z, int32_t da
             sx = ((twice_midcx+xbord)<<15) + scaledxofs;
 
             zoomsc = xdimenscale;   //= scale(xdimen,yxaspect,320);
+            zoomsc = mulscale16(zoomsc, rotatesprite_yxaspect);
 
             if ((dastat & RS_ALIGN_MASK) == RS_ALIGN_MASK)
                 zoomsc = scale(zoomsc, ydim, oydim);
@@ -7692,6 +7698,9 @@ int32_t engineInit(void)
 
     xyaspect = -1;
 
+    rotatesprite_y_offset = 0;
+    rotatesprite_yxaspect = 65536;
+
     showinvisibility = 0;
 
     for (i=1; i<1024; i++)
diff --git a/source/duke3d/src/gamedef.h b/source/duke3d/src/gamedef.h
index e4c8869bf..886c0a538 100644
--- a/source/duke3d/src/gamedef.h
+++ b/source/duke3d/src/gamedef.h
@@ -625,6 +625,8 @@ enum UserdefsLabel_t
     USERDEFS_RETURN,
     USERDEFS_USERBYTEVERSION,
     USERDEFS_AUTOSAVE,
+    USERDEFS_DRAW_Y,
+    USERDEFS_DRAW_YXASPECT,
     USERDEFS_END
 };
 
diff --git a/source/duke3d/src/gamestructures.cpp b/source/duke3d/src/gamestructures.cpp
index 67ee16be3..7f06f922e 100644
--- a/source/duke3d/src/gamestructures.cpp
+++ b/source/duke3d/src/gamestructures.cpp
@@ -1344,6 +1344,8 @@ const memberlabel_t UserdefsLabels[]=
     { "return",                 USERDEFS_RETURN,                 LABEL_HASPARM2, MAX_RETURN_VALUES, -1 },
     { "userbyteversion",        USERDEFS_USERBYTEVERSION,        0, 0, -1 },
     { "autosave",               USERDEFS_AUTOSAVE,               0, 0, -1 },
+    { "draw_y",                 USERDEFS_DRAW_Y,                 0, 0, -1 },
+    { "draw_yxaspect",          USERDEFS_DRAW_YXASPECT,          0, 0, -1 },
 };
 
 int32_t __fastcall VM_GetUserdef(int32_t labelNum, int const lParm2)
@@ -1531,6 +1533,8 @@ int32_t __fastcall VM_GetUserdef(int32_t labelNum, int const lParm2)
             break;
         case USERDEFS_USERBYTEVERSION:        labelNum = ud.userbytever;                  break;
         case USERDEFS_AUTOSAVE:               labelNum = ud.autosave;                     break;
+        case USERDEFS_DRAW_Y:                 labelNum = rotatesprite_y_offset;           break;
+        case USERDEFS_DRAW_YXASPECT:          labelNum = rotatesprite_yxaspect;           break;
 
         default: EDUKE32_UNREACHABLE_SECTION(labelNum = -1; break);
     }
@@ -1730,6 +1734,8 @@ void __fastcall VM_SetUserdef(int const labelNum, int const lParm2, int32_t cons
             break;
         case USERDEFS_USERBYTEVERSION:              ud.userbytever                   = iSet; break;
         case USERDEFS_AUTOSAVE:                     ud.autosave                      = iSet; break;
+        case USERDEFS_DRAW_Y:                       rotatesprite_y_offset            = iSet; break;
+        case USERDEFS_DRAW_YXASPECT:                rotatesprite_yxaspect            = iSet; break;
     }
 }
 
diff --git a/source/duke3d/src/menus.cpp b/source/duke3d/src/menus.cpp
index b00ad605b..3fb005bb5 100644
--- a/source/duke3d/src/menus.cpp
+++ b/source/duke3d/src/menus.cpp
@@ -4357,6 +4357,7 @@ static int32_t xdim_from_320_16(int32_t x)
 }
 static int32_t ydim_from_200_16(int32_t y)
 {
+    y = mulscale16(y + rotatesprite_y_offset - (200<<15), rotatesprite_yxaspect) + (200<<15);
     return scale(y, ydim, 200<<16);
 }