diff --git a/src/engine/engine.hh b/src/engine/engine.hh
index 03ac599..aabe615 100644
--- a/src/engine/engine.hh
+++ b/src/engine/engine.hh
@@ -9,14 +9,7 @@ extern dynent *player;
 extern physent *camera1;                // special ent that acts as camera, same object as player1 in FPS mode
 
 extern int worldscale, worldsize;
-extern int mapversion;
-extern char *maptitle;
 extern int xtraverts, xtravertsva;
-extern const ivec cubecoords[8];
-extern const ivec facecoords[6][4];
-extern const uchar fv[6][4];
-extern const uchar fvmasks[64];
-extern const uchar faceedgesidx[6][4];
 
 // renderlights
 
diff --git a/src/engine/octa.cc b/src/engine/octa.cc
index d96492b..eca9f55 100644
--- a/src/engine/octa.cc
+++ b/src/engine/octa.cc
@@ -8,6 +8,38 @@
 
 #include "engine.hh"
 
+static const uchar fv[6][4] = // indexes for cubecoords, per each vert of a face orientation
+{
+    { 2, 1, 6, 5 },
+    { 3, 4, 7, 0 },
+    { 4, 5, 6, 7 },
+    { 1, 2, 3, 0 },
+    { 6, 1, 0, 7 },
+    { 5, 4, 3, 2 },
+};
+
+static const uchar fvmasks[64] = // mask of verts used given a mask of visible face orientations
+{
+    0x00, 0x66, 0x99, 0xFF, 0xF0, 0xF6, 0xF9, 0xFF,
+    0x0F, 0x6F, 0x9F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xC3, 0xE7, 0xDB, 0xFF, 0xF3, 0xF7, 0xFB, 0xFF,
+    0xCF, 0xEF, 0xDF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0x3C, 0x7E, 0xBD, 0xFF, 0xFC, 0xFE, 0xFD, 0xFF,
+    0x3F, 0x7F, 0xBF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+};
+
+static const uchar faceedgesidx[6][4] = // ordered edges surrounding each orient
+{//0..1 = row edges, 2..3 = column edges
+    { 4,  5,  8, 10 },
+    { 6,  7,  9, 11 },
+    { 8,  9,  0, 2 },
+    { 10, 11, 1, 3 },
+    { 0,  1,  4, 6 },
+    { 2,  3,  5, 7 },
+};
+
 static struct emptycube : cube
 {
     emptycube()
@@ -598,7 +630,7 @@ void mpremip(bool local)
 
 ICOMMAND(remip, "", (), mpremip(true));
 
-const ivec cubecoords[8] = // verts of bounding cube
+static const ivec cubecoords[8] = // verts of bounding cube
 {
 #define GENCUBEVERT(n, x, y, z) ivec(x, y, z),
     GENCUBEVERTS(0, 8, 0, 8, 0, 8)
@@ -639,7 +671,8 @@ void genfaceverts(const cube &c, int orient, ivec v[4])
     }
 }
 
-const ivec facecoords[6][4] =
+#if 0
+static const ivec facecoords[6][4] =
 {
 #define GENFACEORIENT(o, v0, v1, v2, v3) \
     { v0, v1, v2, v3 },
@@ -649,38 +682,7 @@ const ivec facecoords[6][4] =
 #undef GENFACEORIENT
 #undef GENFACEVERT
 };
-
-const uchar fv[6][4] = // indexes for cubecoords, per each vert of a face orientation
-{
-    { 2, 1, 6, 5 },
-    { 3, 4, 7, 0 },
-    { 4, 5, 6, 7 },
-    { 1, 2, 3, 0 },
-    { 6, 1, 0, 7 },
-    { 5, 4, 3, 2 },
-};
-
-const uchar fvmasks[64] = // mask of verts used given a mask of visible face orientations
-{
-    0x00, 0x66, 0x99, 0xFF, 0xF0, 0xF6, 0xF9, 0xFF,
-    0x0F, 0x6F, 0x9F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
-    0xC3, 0xE7, 0xDB, 0xFF, 0xF3, 0xF7, 0xFB, 0xFF,
-    0xCF, 0xEF, 0xDF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
-    0x3C, 0x7E, 0xBD, 0xFF, 0xFC, 0xFE, 0xFD, 0xFF,
-    0x3F, 0x7F, 0xBF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
-    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
-    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
-};
-
-const uchar faceedgesidx[6][4] = // ordered edges surrounding each orient
-{//0..1 = row edges, 2..3 = column edges
-    { 4,  5,  8, 10 },
-    { 6,  7,  9, 11 },
-    { 8,  9,  0, 2 },
-    { 10, 11, 1, 3 },
-    { 0,  1,  4, 6 },
-    { 2,  3,  5, 7 },
-};
+#endif
 
 bool flataxisface(const cube &c, int orient)
 {
diff --git a/src/engine/world.cc b/src/engine/world.cc
index 8e54c1e..d34e772 100644
--- a/src/engine/world.cc
+++ b/src/engine/world.cc
@@ -19,7 +19,6 @@
 
 VARNR(mapscale, worldscale, 1, 0, 0);
 VARNR(mapsize, worldsize, 1, 0, 0);
-SVARR(maptitle, "Untitled Map by Unknown");
 VARNR(emptymap, _emptymap, 1, 0, 0);
 
 VAR(octaentsize, 0, 64, 1024);
diff --git a/src/engine/worldio.cc b/src/engine/worldio.cc
index ec8319d..bb8ed40 100644
--- a/src/engine/worldio.cc
+++ b/src/engine/worldio.cc
@@ -831,8 +831,6 @@ bool load_world(const char *mname, const char *cname)        // still supports a
 
     renderbackground("loading...", mapshot, mname, game::getmapinfo());
 
-    if(maptitle[0] && strcmp(maptitle, "Untitled Map by Unknown")) conoutf(CON_ECHO, "%s", maptitle);
-
     startmap(cname ? cname : mname);
 
     return true;