diff --git a/polymer/eduke32/Makefile.deps b/polymer/eduke32/Makefile.deps
index 720ede8d5..099337068 100644
--- a/polymer/eduke32/Makefile.deps
+++ b/polymer/eduke32/Makefile.deps
@@ -4,10 +4,13 @@ duke3d_h=\
     $(EINC)/build.h \
     $(EINC)/baselayer.h \
     $(EINC)/polymer.h \
+    $(EINC)/polymost.h \
     $(EINC)/cache1d.h \
     $(SRC)/jmact/file_lib.h \
     $(SRC)/jmact/keyboard.h \
     $(SRC)/jmact/control.h \
+    $(SRC)/jmact/mathutil.h \
+    $(SRC)/macros.h \
     $(INC)/gamedefs.h \
     $(INC)/function.h \
     $(INC)/config.h \
@@ -52,9 +55,43 @@ $(OBJ)/osdcmds.$o: $(SRC)/osdcmds.c $(INC)/osdcmds.h $(EINC)/osd.h $(duke3d_h)
 
 $(OBJ)/animvpx.$o: $(SRC)/animvpx.c $(SRC)/animvpx.h $(duke3d_h) $(EINC)/glbuild.h
 
+# editor objects
+m32_script_hs=$(EINC)/m32script.h $(SRC)/m32def.h
+$(OBJ)/astub.$o: $(SRC)/astub.c \
+    $(EINC)/compat.h \
+    $(EINC)/build.h \
+    $(EINC)/editor.h \
+    $(EINC)/pragmas.h \
+    $(EINC)/baselayer.h \
+    $(EINC)/osd.h \
+    $(EINC)/cache1d.h \
+    $(EINC)/crc32.h \
+    $(EINC)/scriptfile.h \
+    $(EINC)/quicklz.h \
+    $(SRC)/macros.h \
+    $(SRC)/osdfuncs.h \
+    $(SRC)/names.h \
+    $(SRC)/mapster32.h \
+    $(SRC)/keys.h \
+    $(m32_script_hs)
+$(OBJ)/sounds_mapster32.$o: $(SRC)/sounds_mapster32.c \
+    $(SRC)/sounds_mapster32.h \
+    $(EINC)/compat.h \
+    $(EINC)/baselayer.h \
+    $(EINC)/cache1d.h \
+    $(EINC)/build.h \
+    $(EINC)/editor.h \
+    $(EINC)/osd.h \
+    $(SRC)/macros.h \
+    $(JAUDIOLIBDIR)/include/fx_man.h \
+    $(SRC)/jmact/mathutil.h
 
-$(OBJ)/astub.$o: $(SRC)/astub.c $(SRC)/mapster32.h $(EINC)/build.h $(EINC)/pragmas.h $(EINC)/compat.h $(EINC)/editor.h
+$(OBJ)/m32def.$o: $(SRC)/m32def.c $(m32_script_hs) $(EINC)/cache1d.h $(SRC)/sounds_mapster32.h $(SRC)/keys.h
+$(OBJ)/m32exec.$o: $(SRC)/m32exec.c $(m32_script_hs) $(SRC)/sounds_mapster32.h $(EINC)/osd.h $(SRC)/keys.h $(JAUDIOLIBDIR)/include/fx_man.h
+$(OBJ)/m32structures.$o: $(SRC)/m32structures.c $(m32_script_hs) $(EINC)/compat.h $(EINC)/prlights.h
+$(OBJ)/m32vars.$o: $(SRC)/m32vars.c $(SRC)/m32structures.c $(m32_script_hs) $(EINC)/osd.h $(SRC)/keys.h $(EINC)/polymer.h 
 
+# misc objects
 $(OBJ)/game_icon.$o: $(RSRC)/game_icon.c
 $(OBJ)/build_icon.$o: $(RSRC)/build_icon.c
 
@@ -71,7 +108,7 @@ $(OBJ)/file_lib.$o: $(SRC)/jmact/file_lib.c $(SRC)/jmact/file_lib.h
 $(OBJ)/control.$o: $(SRC)/jmact/control.c $(SRC)/jmact/control.h $(SRC)/jmact/keyboard.h $(SRC)/jmact/mouse.h $(EINC)/baselayer.h
 $(OBJ)/keyboard.$o: $(SRC)/jmact/keyboard.c $(SRC)/jmact/keyboard.h $(EINC)/compat.h $(EINC)/baselayer.h
 $(OBJ)/mouse.$o: $(SRC)/jmact/mouse.c $(SRC)/jmact/mouse.h $(EINC)/baselayer.h
-$(OBJ)/mathutil.$o: $(SRC)/jmact/mathutil.c
+$(OBJ)/mathutil.$o: $(SRC)/jmact/mathutil.c $(EINC)/compat.h $(EINC)/pragmas.h
 $(OBJ)/scriplib.$o: $(SRC)/jmact/scriplib.c $(SRC)/jmact/scriplib.h $(SRC)/jmact/_scrplib.h $(EINC)/compat.h
 
 # jAudioLib objects
@@ -83,7 +120,7 @@ $(OBJ)/mv_mix-c.$o: $(SRC)/jaudiolib/mv_mix-c.c
 $(OBJ)/mvreverb-c.$o: $(SRC)/jaudiolib/mvreverb-c.c
 $(OBJ)/pitch.$o: $(SRC)/jaudiolib/pitch.c $(SRC)/jaudiolib/pitch.h
 $(OBJ)/multivoc.$o: $(SRC)/jaudiolib/multivoc.c $(SRC)/jaudiolib/linklist.h $(SRC)/jaudiolib/pitch.h $(SRC)/jaudiolib/multivoc.h $(SRC)/jaudiolib/_multivc.h
-$(OBJ)/fx_man.$o: $(SRC)/jaudiolib/fx_man.c $(SRC)/jaudiolib/multivoc.h $(SRC)/jaudiolib/ll_man.h $(SRC)/jaudiolib/fx_man.h
+$(OBJ)/fx_man.$o: $(SRC)/jaudiolib/fx_man.c $(SRC)/jaudiolib/multivoc.h $(SRC)/jaudiolib/ll_man.h $(JAUDIOLIBDIR)/include/fx_man.h
 $(OBJ)/dsoundout.$o: $(SRC)/jaudiolib/dsoundout.c $(SRC)/jaudiolib/dsoundout.h
 $(OBJ)/openal.$o: $(SRC)/jaudiolib/openal.c $(SRC)/jaudiolib/openal.h
 $(OBJ)/dsl.$o: $(SRC)/jaudiolib/dsl.c $(SRC)/jaudiolib/dsl.h $(EINC)/compat.h
diff --git a/polymer/eduke32/build/src/build.c b/polymer/eduke32/build/src/build.c
index 516c903f2..5504cdd5f 100644
--- a/polymer/eduke32/build/src/build.c
+++ b/polymer/eduke32/build/src/build.c
@@ -4699,6 +4699,9 @@ end_point_dragging:
                 if (joinstat==0)
                 {
                     message("No consistent joining combination found");
+                    OSD_Printf("comp0: c=%d,f=%d;  comp1: c=%d,f=%d  (1:extended, 2:z mismatch, 4:sloped)\n",
+                               compstat[0][YAX_CEILING], compstat[0][YAX_FLOOR],
+                               compstat[1][YAX_CEILING], compstat[1][YAX_FLOOR]);
                     //for (i=0; i<2; i++) for (j=0; j<2; j++) message("%d", compstat[i][j]);
                     goto end_join_sectors;
                 }
diff --git a/polymer/eduke32/samples/a.m32 b/polymer/eduke32/samples/a.m32
index 64c1cc9c2..df21aec9c 100644
--- a/polymer/eduke32/samples/a.m32
+++ b/polymer/eduke32/samples/a.m32
@@ -1185,6 +1185,51 @@ defstate chselshade
     }
 ends
 
+defstate correctslopes
+    for i allsectors
+    {
+        set j sector[i].ceilingstat, and j 2
+        ife j 2
+        {
+            ife sector[i].ceilingheinum 0
+            {
+                sub sector[i].ceilingstat 2
+                qsprintf TQUOTE "sec %d ceilingstat cleared bit 2" i
+                quote TQUOTE
+            }
+        }
+        else
+        {
+            ifn sector[i].ceilingheinum 0
+            {
+                set sector[i].ceilingheinum 0
+                qsprintf TQUOTE "sec %d ceilingheinum set to 0" i
+                quote TQUOTE
+            }
+        }
+
+        set j sector[i].floorstat, and j 2
+        ife j 2
+        {
+            ife sector[i].floorheinum 0
+            {
+                sub sector[i].floorstat 2
+                qsprintf TQUOTE "sec %d floorstat cleared bit 2" i
+                quote TQUOTE
+            }
+        }
+        else
+        {
+            ifn sector[i].floorheinum 0
+            {
+                set sector[i].floorheinum 0
+                qsprintf TQUOTE "sec %d floorheinum set to 0" i
+                quote TQUOTE
+            }
+        }
+    }
+ends
+
 ////////// USER AREA //////////
 
 // key settings
diff --git a/polymer/eduke32/source/astub.c b/polymer/eduke32/source/astub.c
index 50feedbf8..31dfc4ad6 100644
--- a/polymer/eduke32/source/astub.c
+++ b/polymer/eduke32/source/astub.c
@@ -25,11 +25,12 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 #include "editor.h"
 #include "pragmas.h"
 #include "baselayer.h"
-#include "names.h"
 #include "osd.h"
-#include "osdfuncs.h"
 #include "cache1d.h"
 
+#include "osdfuncs.h"
+#include "names.h"
+
 #include "mapster32.h"
 #include "keys.h"
 
@@ -9194,7 +9195,8 @@ static int32_t osdcmd_do(const osdfuncparm_t *parm)
         if (vm.updatehighlightsector)
         {
             update_highlightsector();
-            ovh_whiteoutgrab(1);
+            if (qsetmode != 200)
+                ovh_whiteoutgrab(1);
             vm.updatehighlightsector = 0;
         }
 
@@ -10498,6 +10500,15 @@ void ExtPreCheckKeys(void) // just before drawrooms
     {
         if (shadepreview)
         {
+            for (i=0; i<highlightsectorcnt; i++)
+            {
+                ii = highlightsector[i];
+                sectorpals[ii][0] = sector[ii].floorpal;
+                sectorpals[ii][1] = sector[ii].ceilingpal;
+
+                sector[ii].floorpal = sector[ii].ceilingpal = 6;
+            }
+
 //            int32_t i = 0;
             for (i=0; i<MAXSPRITES; i++)
             {
@@ -11105,9 +11116,16 @@ void ExtCheckKeys(void)
 
     if (qsetmode == 200 && shadepreview)
     {
-        int32_t i = 0;
+        int32_t i = 0, ii;
         int32_t w, isec, start_wall, end_wall;
 
+        for (i=0; i<highlightsectorcnt; i++)
+        {
+            ii = highlightsector[i];
+            sector[ii].floorpal = sectorpals[ii][0];
+            sector[ii].ceilingpal = sectorpals[ii][1];
+        }
+
         for (i=0; i<MAXSPRITES; i++)
         {
             if (sprite[i].statnum==MAXSTATUS || sprite[i].picnum != SECTOREFFECTOR)
diff --git a/polymer/eduke32/source/m32exec.c b/polymer/eduke32/source/m32exec.c
index 22a535b67..1d7e9b07f 100644
--- a/polymer/eduke32/source/m32exec.c
+++ b/polymer/eduke32/source/m32exec.c
@@ -197,7 +197,8 @@ void VM_OnEvent(register int32_t iEventID, register int32_t iActor)
         if (vm.updatehighlightsector)
         {
             update_highlightsector();
-            ovh_whiteoutgrab(1);
+            if (qsetmode != 200)
+                ovh_whiteoutgrab(1);
             vm.updatehighlightsector = 0;
         }
 
diff --git a/polymer/eduke32/source/sounds_mapster32.c b/polymer/eduke32/source/sounds_mapster32.c
index 15b0ec22a..e6f2712da 100644
--- a/polymer/eduke32/source/sounds_mapster32.c
+++ b/polymer/eduke32/source/sounds_mapster32.c
@@ -22,7 +22,6 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
 // Stripped sounds.c for use in Mapster32, breaks all ties to game & music
 
-//#include <conio.h>
 #include <stdio.h>
 #include <string.h>
 
@@ -30,8 +29,6 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 #include "baselayer.h"
 
 #include "fx_man.h"
-//#include "music.h"
-//#include "duke3d.h"
 #include "osd.h"
 
 #include "cache1d.h"