diff --git a/drawing.cpp b/drawing.cpp
index 84e78915..b4fe8f63 100644
--- a/drawing.cpp
+++ b/drawing.cpp
@@ -34,6 +34,7 @@ static const int POLY_ALWAYS_IN = (1<<21);      // always draw this
 static const int POLY_TRIANGLES = (1<<22);      // made of TRIANGLES, not TRIANGLE_FAN
 static const int POLY_INTENSE = (1<<23);        // extra intense colors
 static const int POLY_DEBUG = (1<<24);          // debug this shape
+static const int POLY_PRINTABLE = (1<<25);      // these walls are printable
 
 /** \brief A graphical element that can be drawn. Objects are not drawn immediately but rather queued.
  *
diff --git a/polygons.cpp b/polygons.cpp
index d782e07d..41986e45 100644
--- a/polygons.cpp
+++ b/polygons.cpp
@@ -756,7 +756,7 @@ void geometry_information::make_wall(int id, vector<hyperpoint> vertices, vector
   ld yy = log(2) / 2;
 
   bshape(shWall3D[id], PPR::WALL);
-  last->flags |= POLY_TRIANGLES;
+  last->flags |= POLY_TRIANGLES | POLY_PRINTABLE;
   
   hyperpoint center = Hypc;
   int n = isize(vertices);
@@ -842,8 +842,13 @@ void geometry_information::make_wall(int id, vector<hyperpoint> vertices, vector
     hpcpush(mid(C0, hpc[a]));
   if(shWall3D[id].flags & POLY_TRIANGLES)
     last->flags |= POLY_TRIANGLES;
+  if(shWall3D[id].flags & POLY_PRINTABLE)
+    last->flags |= POLY_PRINTABLE;
 
   finishshape();
+  
+  shWall3D[id].intester = C0;
+  shMiniWall3D[id].intester = C0;
 
   shPlainWall3D[id] = shWall3D[id]; // force_triangles ? shWall3D[id] : shWireframe3D[id];
   }
diff --git a/screenshot.cpp b/screenshot.cpp
index 814329e0..c0ad9cf3 100644
--- a/screenshot.cpp
+++ b/screenshot.cpp
@@ -242,6 +242,8 @@ EX always_false in;
 #if CAP_WRL
   EX bool in;
   
+  EX bool print;
+  
   fhstream f;
   
   string coord(ld val) {
@@ -264,6 +266,7 @@ EX always_false in;
     }
   
   EX void polygon(dqi_poly& p) {
+    if(print && !(p.flags & POLY_PRINTABLE)) return;
     if(!(p.flags & POLY_TRIANGLES)) return;
     println(f, "Shape {");     
     println(f, "  appearance Appearance {");
@@ -275,13 +278,36 @@ EX always_false in;
     println(f, "  geometry IndexedFaceSet {");    
     println(f, "    coord Coordinate {");
     println(f, "      point [");
+    vector<hyperpoint> data;
     for(int i=0; i<p.cnt; i++) {
       glvertex v = p.tab[0][p.offset+i];
-      hyperpoint h = p.V * glhr::gltopoint(v);
-      // println(f, "#      ", glhr::gltopoint(v));
-      hyperpoint h1;
-      applymodel(h, h1);
-      println(f, "       ", coord(h1, 3), ",");
+      data.push_back(glhr::gltopoint(v));
+      }
+    for(auto& d: data) {
+      hyperpoint h;
+      h = p.V * d;
+      applymodel(h, d);
+      }
+    if(print) {
+      hyperpoint ctr1;
+      applymodel(p.V * p.intester, ctr1);
+      ld sdet = 0;
+      if(1) {
+        dynamicval<eGeometry> g(geometry, gEuclid);
+        for(int i=0; i<p.cnt; i+=3) {
+          transmatrix T;
+          T[0] = data[i];
+          T[1] = data[i+1];
+          T[2] = data[i+2];
+          sdet += det(T);
+          }
+        if(sdet > 0)
+          for(int i=0; i<p.cnt; i+=3) 
+            swap(data[i+1], data[i+2]);
+        }
+      }    
+    for(int i=0; i<p.cnt; i++) {
+      println(f, "       ", coord(data[i], 3), ",");
       }
     println(f, "        ]");
     println(f, "      }");
@@ -290,7 +316,10 @@ EX always_false in;
       println(f, "        ", i, " ", i+1, " ", i+2, " -1,");
       }
     println(f, "      ]");
-    println(f, "    creaseAngle 0.0 convex FALSE solid TRUE ccw FALSE");
+    if(print)
+      println(f, "    creaseAngle 0.0 convex FALSE solid TRUE ccw FALSE");
+    else
+      println(f, "    creaseAngle 0.0 convex FALSE solid FALSE");
     println(f, "    }");
     println(f, "  }");
     }                          
@@ -507,10 +536,16 @@ int png_read_args() {
   else if(argis("-shotaa")) {
     shift(); shot_aa = argi();
     }
-  else if(argis("-wrlshot")) {
+  else if(argis("-modelshot")) {
     PHASE(3); shift(); start_game();
-    printf("saving WRL screenshot to %s\n", argcs());
-    shot::make_wrl = true;
+    printf("saving WRL model to %s\n", argcs());
+    shot::make_wrl = true; wrl::print = false;
+    shot::take(argcs());
+    }
+  else if(argis("-printshot")) {
+    PHASE(3); shift(); start_game();
+    printf("saving 3D printable model to %s\n", argcs());
+    shot::make_wrl = true; wrl::print = true;
     shot::take(argcs());
     }
   else return 1;