diff --git a/pandatool/src/gtk-stats/gtkStats.cxx b/pandatool/src/gtk-stats/gtkStats.cxx
index 45c286fa59..8913d8caf4 100644
--- a/pandatool/src/gtk-stats/gtkStats.cxx
+++ b/pandatool/src/gtk-stats/gtkStats.cxx
@@ -13,14 +13,6 @@
 
 GtkStatsMainWindow *GtkStats::_main_window = NULL;
 
-static bool user_interrupted = false;
-
-// This simple signal handler lets us know when the user has pressed
-// control-C, so we can clean up nicely.
-static void signal_handler(int) {
-  user_interrupted = true;
-}
-
 ////////////////////////////////////////////////////////////////////
 //     Function: GtkStats::Constructor
 //       Access: Public
diff --git a/pandatool/src/gtk-stats/gtkStatsPianoRoll.cxx b/pandatool/src/gtk-stats/gtkStatsPianoRoll.cxx
index 976c1785b2..dade009c40 100644
--- a/pandatool/src/gtk-stats/gtkStatsPianoRoll.cxx
+++ b/pandatool/src/gtk-stats/gtkStatsPianoRoll.cxx
@@ -253,7 +253,7 @@ pack_labels() {
 
   int num_labels = get_num_labels();
 
-  while (_y_positions.size() < num_labels) {
+  while ((int)_y_positions.size() < num_labels) {
     _y_positions.push_back(0);
   }
 
diff --git a/pandatool/src/pstatserver/pStatClientData.cxx b/pandatool/src/pstatserver/pStatClientData.cxx
index e3bdf92855..d8790c1407 100644
--- a/pandatool/src/pstatserver/pStatClientData.cxx
+++ b/pandatool/src/pstatserver/pStatClientData.cxx
@@ -232,7 +232,7 @@ add_collector(PStatCollectorDef *def) {
   nassertv(def->_index < 1000);
 
   // Make sure we have enough slots allocated.
-  while (_collectors.size() <= def->_index) {
+  while ((int)_collectors.size() <= def->_index) {
     _collectors.push_back(NULL);
   }
 
@@ -257,7 +257,7 @@ define_thread(int thread_index, const string &name) {
   nassertv(thread_index < 1000);
 
   // Make sure we have enough slots allocated.
-  while (_threads.size() <= thread_index) {
+  while ((int)_threads.size() <= thread_index) {
     _threads.push_back(Thread());
   }
 
diff --git a/pandatool/src/pstatserver/pStatGraph.I b/pandatool/src/pstatserver/pStatGraph.I
index 2f3b45499a..70290aed1b 100644
--- a/pandatool/src/pstatserver/pStatGraph.I
+++ b/pandatool/src/pstatserver/pStatGraph.I
@@ -33,7 +33,7 @@ get_num_labels() const {
 ////////////////////////////////////////////////////////////////////
 INLINE int PStatGraph::
 get_label_collector(int n) const {
-  nassertr(n >= 0 && n < _labels.size(), 0);
+  nassertr(n >= 0 && n < (int)_labels.size(), 0);
   return _labels[n];
 }
 
@@ -44,7 +44,7 @@ get_label_collector(int n) const {
 ////////////////////////////////////////////////////////////////////
 INLINE string PStatGraph::
 get_label_name(int n) const {
-  nassertr(n >= 0 && n < _labels.size(), string());
+  nassertr(n >= 0 && n < (int)_labels.size(), string());
   return _monitor->get_client_data()->get_collector_name(_labels[n]);
 }
 
@@ -55,7 +55,7 @@ get_label_name(int n) const {
 ////////////////////////////////////////////////////////////////////
 INLINE RGBColorf PStatGraph::
 get_label_color(int n) const {
-  nassertr(n >= 0 && n < _labels.size(), RGBColorf(0.0, 0.0, 0.0));
+  nassertr(n >= 0 && n < (int)_labels.size(), RGBColorf(0.0, 0.0, 0.0));
   return _monitor->get_collector_color(_labels[n]);
 }
 
diff --git a/pandatool/src/pstatserver/pStatGraph.cxx b/pandatool/src/pstatserver/pStatGraph.cxx
index d69ff62e20..aeb337fb6d 100644
--- a/pandatool/src/pstatserver/pStatGraph.cxx
+++ b/pandatool/src/pstatserver/pStatGraph.cxx
@@ -92,7 +92,7 @@ const PStatGraph::GuideBar &PStatGraph::
 get_guide_bar(int n) const {
 #ifndef NDEBUG
   static GuideBar bogus_bar(0.0, "bogus", false);
-  nassertr(n >= 0 && n < _guide_bars.size(), bogus_bar);
+  nassertr(n >= 0 && n < (int)_guide_bars.size(), bogus_bar);
 #endif
   return _guide_bars[n];
 }
diff --git a/pandatool/src/pstatserver/pStatThreadData.cxx b/pandatool/src/pstatserver/pStatThreadData.cxx
index 6b63b4ed9c..5daeeda0ab 100644
--- a/pandatool/src/pstatserver/pStatThreadData.cxx
+++ b/pandatool/src/pstatserver/pStatThreadData.cxx
@@ -81,7 +81,7 @@ bool PStatThreadData::
 has_frame(int frame_number) const {
   int rel_frame = frame_number - _first_frame_number;
   
-  return (rel_frame >= 0 && rel_frame < _frames.size() &&
+  return (rel_frame >= 0 && rel_frame < (int)_frames.size() &&
 	  _frames[rel_frame] != (PStatFrameData *)NULL);
 }
 
@@ -96,7 +96,7 @@ has_frame(int frame_number) const {
 const PStatFrameData &PStatThreadData::
 get_frame(int frame_number) const {
   int rel_frame = frame_number - _first_frame_number;
-  if (rel_frame >= _frames.size()) {
+  if (rel_frame >= (int)_frames.size()) {
     rel_frame = _frames.size() - 1;
   }
 
@@ -108,11 +108,11 @@ get_frame(int frame_number) const {
   } else {
     // No frame data that old.  Return the oldest frame we've got.
     rel_frame = 0;
-    while (rel_frame < _frames.size() && 
+    while (rel_frame < (int)_frames.size() && 
 	   _frames[rel_frame] == (PStatFrameData *)NULL) {
       rel_frame++;
     }
-    return (rel_frame < _frames.size()) ? *_frames[rel_frame] : _null_frame;
+    return (rel_frame < (int)_frames.size()) ? *_frames[rel_frame] : _null_frame;
   }
 }
 
@@ -164,12 +164,12 @@ get_frame_at_time(double time) const {
 int PStatThreadData::
 get_frame_number_at_time(double time, int hint) const {
   hint -= _first_frame_number;
-  if (hint >= 0 && hint < _frames.size()) {
+  if (hint >= 0 && hint < (int)_frames.size()) {
     if (_frames[hint] != (PStatFrameData *)NULL &&
 	_frames[hint]->get_start() <= time) {
       // The hint might be right.  Scan forward from there.
       int i = hint + 1;
-      while (i < _frames.size() &&
+      while (i < (int)_frames.size() &&
 	     (_frames[i] == (PStatFrameData *)NULL ||
 	      _frames[i]->get_start() <= time)) {
 	if (_frames[i] != (PStatFrameData *)NULL) {
@@ -309,13 +309,13 @@ record_new_frame(int frame_number, PStatFrameData *frame_data) {
     _frames.push_back(NULL);
 
   } else {
-    while (_first_frame_number + _frames.size() <= frame_number) {
+    while (_first_frame_number + (int)_frames.size() <= frame_number) {
       _frames.push_back(NULL);
     }
   }
 
   int index = frame_number - _first_frame_number;
-  nassertv(index >= 0 && index < _frames.size());
+  nassertv(index >= 0 && index < (int)_frames.size());
 
   if (_frames[index] != (PStatFrameData *)NULL) {
     nout << "Got repeated frame data for frame " << frame_number << "\n";
diff --git a/pandatool/src/stitch/stitchImageProgram.cxx b/pandatool/src/stitch/stitchImageProgram.cxx
index da3830cf8b..cc8ad7c576 100644
--- a/pandatool/src/stitch/stitchImageProgram.cxx
+++ b/pandatool/src/stitch/stitchImageProgram.cxx
@@ -20,6 +20,11 @@ StitchImageProgram() {
 
      "The images are generated internally using a CPU-based rasterization "
      "algorithm (no graphics hardware is used).");
+
+  add_option
+    ("f", "", 0, 
+     "Apply a very simple filter in an attempt to smooth the results.",
+     &StitchImageProgram::dispatch_none, &_filter_output);
 }
 
 ////////////////////////////////////////////////////////////////////
@@ -30,6 +35,7 @@ StitchImageProgram() {
 void StitchImageProgram::
 run() {
   StitchImageRasterizer outputter;
+  outputter._filter_output = _filter_output;
   _command_file.process(outputter);
 }
 
diff --git a/pandatool/src/stitch/stitchImageProgram.h b/pandatool/src/stitch/stitchImageProgram.h
index f6cf853764..7bf0709e38 100644
--- a/pandatool/src/stitch/stitchImageProgram.h
+++ b/pandatool/src/stitch/stitchImageProgram.h
@@ -21,6 +21,9 @@ public:
   StitchImageProgram();
 
   void run();
+
+private:
+  bool _filter_output;
 };
 
 #endif
diff --git a/pandatool/src/stitchbase/morphGrid.cxx b/pandatool/src/stitchbase/morphGrid.cxx
index b0219c9889..3885ffb318 100644
--- a/pandatool/src/stitchbase/morphGrid.cxx
+++ b/pandatool/src/stitchbase/morphGrid.cxx
@@ -228,7 +228,7 @@ init(int x_verts, int y_verts) {
 				    &_table[y][x + 1]));
     }
   }
-  assert(_triangles.size() == num_tris);
+  assert((int)_triangles.size() == num_tris);
 
   // Now create a 2-d table of TriangleTree nodes, each of which
   // points to a pair of triangles.  We'll use this to build up the
diff --git a/pandatool/src/stitchbase/stitchCommand.cxx b/pandatool/src/stitchbase/stitchCommand.cxx
index 6b2666ea84..11a2fa60c5 100644
--- a/pandatool/src/stitchbase/stitchCommand.cxx
+++ b/pandatool/src/stitchbase/stitchCommand.cxx
@@ -475,6 +475,9 @@ make_lens() {
     case C_singularity_tolerance:
       _lens->set_singularity_tolerance((*ci)->get_number());
       break;
+
+    default:
+      break;
     }
   }
 
@@ -616,6 +619,9 @@ create_image() {
     case C_grid:
       image->setup_grid((int)(*ci)->_n[0], (int)(*ci)->_n[1]);
       break;
+
+    default:
+      break;
     }
   }
 
diff --git a/pandatool/src/stitchbase/stitchImage.cxx b/pandatool/src/stitchbase/stitchImage.cxx
index 543e7353ad..b0b913f62f 100644
--- a/pandatool/src/stitchbase/stitchImage.cxx
+++ b/pandatool/src/stitchbase/stitchImage.cxx
@@ -14,13 +14,13 @@ StitchImage::
 StitchImage(const string &name, const string &filename,
 	    StitchLens *lens, const LVecBase2d &size_pixels,
 	    const LVecBase2d &pixels_per_mm) :
-  _filename(filename),
-  _name(name),
   _lens(lens),
   _size_pixels(size_pixels),
   _pixels_per_mm(pixels_per_mm),
   _rotate(LMatrix3d::ident_mat()),
-  _inv_rotate(LMatrix3d::ident_mat())
+  _inv_rotate(LMatrix3d::ident_mat()),
+  _filename(filename),
+  _name(name)
 {
   _size_mm.set((_size_pixels[0] - 1.0) / _pixels_per_mm[0],
 	       (_size_pixels[1] - 1.0) / _pixels_per_mm[1]);
diff --git a/pandatool/src/stitchbase/stitchImageRasterizer.cxx b/pandatool/src/stitchbase/stitchImageRasterizer.cxx
index 18c8c06969..7d5d11410a 100644
--- a/pandatool/src/stitchbase/stitchImageRasterizer.cxx
+++ b/pandatool/src/stitchbase/stitchImageRasterizer.cxx
@@ -12,7 +12,6 @@
 
 StitchImageRasterizer::
 StitchImageRasterizer() {
-  //_filter_output = false;
   _filter_output = true;
 }
 
diff --git a/pandatool/src/stitchbase/stitcher.cxx b/pandatool/src/stitchbase/stitcher.cxx
index ad76800ac6..88cbbf71e8 100644
--- a/pandatool/src/stitchbase/stitcher.cxx
+++ b/pandatool/src/stitchbase/stitcher.cxx
@@ -258,8 +258,8 @@ stitch_image(StitchImage *image) {
       best_i = 0;
       best_j = 0;
     } else {
-      for (int i = 0; i < mp.size(); i++) {
-	for (int j = 0; j < mp.size(); j++) {
+      for (int i = 0; i < (int)mp.size(); i++) {
+	for (int j = 0; j < (int)mp.size(); j++) {
 	  if (j != i) {
 	    LMatrix3d rot;
 	    double score = try_match(image, rot, mp, i, j);
diff --git a/pandatool/src/stitchbase/triangleRasterizer.cxx b/pandatool/src/stitchbase/triangleRasterizer.cxx
index 7cc7b0dd99..69a982843c 100644
--- a/pandatool/src/stitchbase/triangleRasterizer.cxx
+++ b/pandatool/src/stitchbase/triangleRasterizer.cxx
@@ -517,7 +517,6 @@ filter_pixel(RGBColord &rgb, double &alpha,
   int si = (int)(s + 0.5);
   int ti = _texture->get_y_size() - 1 - (int)(t + 0.5);
   
-  int n = 0;
   rgb.set(0.0, 0.0, 0.0);
   alpha = 0.0;
   
@@ -530,6 +529,8 @@ filter_pixel(RGBColord &rgb, double &alpha,
     return;
   }
 
+  int num_total = 0;
+  int num_visible = 0;
   for (int yr = -ri; yr <= ri; yr++) {
     int tii = ti + yr;
     for (int xr = -ri; xr <= ri; xr++) {
@@ -537,21 +538,22 @@ filter_pixel(RGBColord &rgb, double &alpha,
       if (sii >= 0 && sii < _texture->get_x_size() &&
 	  tii >= 0 && tii < _texture->get_y_size()) {
 	rgb += _texture->get_xel(sii, tii);
-	alpha += 1.0;
+	num_visible++;
       }
-      n++;
+      num_total++;
     }
   }
 
-  if (alpha != 0.0) {
-    rgb /= alpha;
+  if (num_visible != 0) {
+    rgb /= (double)num_visible;
+    alpha = 1.0;
   }
 
   // We would do this to antialias the edge of the image.  However, it
   // seems to cause problems at seams, so we won't do it.
   /*
-  if (n != 0) {
-    alpha = alpha / (double)n;
+  if (num_total != 0) {
+    alpha = (double)num_visible / (double)num_total;
   }
   */
 }
diff --git a/pandatool/src/stitchviewer/stitchImageVisualizer.cxx b/pandatool/src/stitchviewer/stitchImageVisualizer.cxx
index c1febb44c5..d126406d54 100644
--- a/pandatool/src/stitchviewer/stitchImageVisualizer.cxx
+++ b/pandatool/src/stitchviewer/stitchImageVisualizer.cxx
@@ -280,7 +280,7 @@ handle_event(CPT(Event) event) {
 
   if (name.size() == 1 && isalpha(name[0])) {
     int index = tolower(name[0]) - 'a';
-    if (index >= 0 && index < _images.size()) {
+    if (index >= 0 && index < (int)_images.size()) {
       toggle_viz(_images[index]);
       return;
     }
diff --git a/pandatool/src/stitchviewer/triangleMesh.cxx b/pandatool/src/stitchviewer/triangleMesh.cxx
index 373822f9d6..1abf07a673 100644
--- a/pandatool/src/stitchviewer/triangleMesh.cxx
+++ b/pandatool/src/stitchviewer/triangleMesh.cxx
@@ -9,9 +9,9 @@
 
 TriangleMesh::
 TriangleMesh(int x_verts, int y_verts) :
+  _coords(0), _norms(0), _colors(0), _texcoords(0),
   _x_verts(x_verts),
-  _y_verts(y_verts),
-  _coords(0), _norms(0), _colors(0), _texcoords(0)
+  _y_verts(y_verts)
 {
 }
 
@@ -32,7 +32,7 @@ get_num_verts() const {
 
 GeomTristrip *TriangleMesh::
 build_mesh() const {
-  int num_verts = _x_verts * _y_verts;
+  //  int num_verts = _x_verts * _y_verts;
   int num_tstrips = (_y_verts-1);
   int tstrip_length = 2*(_x_verts-1)+2;