diff --git a/polymer/eduke32/MakeDistributions b/polymer/eduke32/MakeDistributions
index f5e023608..8d1f6ebe3 100644
--- a/polymer/eduke32/MakeDistributions
+++ b/polymer/eduke32/MakeDistributions
@@ -1,12 +1,12 @@
 # GNU Makefile to prepare source and binary distributions.
 #    make -f MakeDistributions [source|binary]
 
-SOURCEFILES=GNU.TXT \
+SOURCEFILES=GNU.TXT buildlic.txt \
 	   Makefile Makefile.deps Makefile.msvc Makefile.watcom MakeDistributions \
 	   makemsc.bat makew.bat ChangeLog.html duke3d.def.sample \
 	   SEHELP.HLP STHELP.HLP ChangeLog enhance.con.sample
 
-BINARYFILES=mapster32.exe eduke32.exe GNU.TXT  \
+BINARYFILES=mapster32.exe eduke32.exe GNU.TXT buildlic.txt \
            ChangeLog.html setup.exe duke3d.def.sample SEHELP.HLP STHELP.HLP \
 	   ChangeLog enhance.con.sample duke3d_w32.exe
 
diff --git a/polymer/eduke32/buildlic.txt b/polymer/eduke32/buildlic.txt
new file mode 100755
index 000000000..3a3985bb6
--- /dev/null
+++ b/polymer/eduke32/buildlic.txt
@@ -0,0 +1,71 @@
+BUILD SOURCE CODE LICENSE TERMS:                             06/20/2000
+
+[1] I give you permission to make modifications to my Build source and
+       distribute it, BUT:
+
+[2] Any derivative works based on my Build source may be distributed ONLY
+       through the INTERNET.
+
+[3] Distribution of any derivative works MUST be done completely FREE of
+       charge - no commercial exploitation whatsoever.
+
+[4] Anything you distribute which uses a part of my Build Engine source
+       code MUST include:
+
+   [A] The following message somewhere in the archive:
+
+       // "Build Engine & Tools" Copyright (c) 1993-1997 Ken Silverman
+       // Ken Silverman's official web site: "http://www.advsys.net/ken"
+       // See the included license file "BUILDLIC.TXT" for license info.
+
+   [B] This text file "BUILDLIC.TXT" along with it.
+
+   [C] Any source files that you modify must include this message as well:
+
+       // This file has been modified from Ken Silverman's original release
+
+[5] The use of the Build Engine for commercial purposes will require an
+       appropriate license arrangement with me. Contact information is
+       on my web site.
+
+[6] I take no responsibility for damage to your system.
+
+[7] Technical support: Before contacting me with questions, please read
+       and do ALL of the following!
+
+   [A] Look through ALL of my text files. There are 7 of them (including this
+          one). I like to think that I wrote them for a reason. You will find
+          many of your answers in the history section of BUILD.TXT and
+          BUILD2.TXT (they're located inside SRC.ZIP).
+
+   [B] If that doesn't satisfy you, then try going to:
+
+             "http://www.advsys.net/ken/buildsrc"
+
+          where I will maintain a Build Source Code FAQ (or perhaps I might
+          just provide a link to a good FAQ).
+
+   [C] I am willing to respond to questions, but ONLY if they come at a rate
+          that I can handle.
+
+             PLEASE TRY TO AVOID ASKING DUPLICATE QUESTIONS!
+
+          As my line of defense, I will post my current policy about
+          answering Build source questions (right below the E-mail address
+          on my web site.) You can check there to see if I'm getting
+          overloaded with questions or not.
+
+          If I'm too busy, it might say something like this:
+
+               I'm too busy to answer Build source questions right now.
+               Sorry, but don't expect a reply from me any time soon.
+
+          If I'm open for Build source questions, please state your question
+             clearly and don't include any unsolicited attachments unless
+             they're really small (like less than 50k). Assume that I have
+             a 28.8k modem. Also, don't leave out important details just
+             to make your question appear shorter - making me guess what
+             you're asking doesn't save me time!
+
+----------------------------------------------------------------------------
+-Ken S. (official web site: http://www.advsys.net/ken)
diff --git a/polymer/eduke32/installer/eduke32.nsi b/polymer/eduke32/installer/eduke32.nsi
index 69454760d..24531bfa5 100755
--- a/polymer/eduke32/installer/eduke32.nsi
+++ b/polymer/eduke32/installer/eduke32.nsi
@@ -73,7 +73,8 @@ Section "!Game" SEC_GAME
   File "..\eduke32.exe"
   CreateDirectory "$SMPROGRAMS\$ICONS_GROUP"
   CreateShortCut "$SMPROGRAMS\$ICONS_GROUP\EDuke32.lnk" "$INSTDIR\eduke32.exe"
-  File "..\GNU.TXT"
+  File "..\GNU.TXT"
+  File "..\buildlic.txt"
   File "..\ChangeLog.html"
   File "..\ChangeLog"
   File "..\setup.exe"
@@ -149,7 +150,8 @@ Section Uninstall
   Delete "$INSTDIR\setup.exe"
   Delete "$INSTDIR\ChangeLog.html"
   Delete "$INSTDIR\ChangeLog"
-  Delete "$INSTDIR\GNU.TXT"
+  Delete "$INSTDIR\GNU.TXT"
+  Delete "$INSTDIR\buildlic.txt"
   Delete "$INSTDIR\eduke32.exe"
   Delete "$INSTDIR\duke3d_w32.exe"
 ;  Delete "$INSTDIR\datainst.exe"
diff --git a/polymer/eduke32/source/premap.c b/polymer/eduke32/source/premap.c
index c77feb212..a336d1c2c 100644
--- a/polymer/eduke32/source/premap.c
+++ b/polymer/eduke32/source/premap.c
@@ -326,8 +326,8 @@ void cacheit(void)
             if (waloff[i] == 0)
                 loadtile((short)i);
 
-#ifdef POLYMOST
-            if (useprecache) {
+#if defined(POLYMOST) && defined(USE_OPENGL)
+            if (useprecache && !KB_KeyPressed(sc_Space)) {
                 if (precachehightile[0][i>>3] & pow2char[i&7])
                     for (k=0; k<MAXPALOOKUPS; k++)
                         polymost_precache(i,k,0);