diff --git a/basegraph.cpp b/basegraph.cpp
index bcacfcbf..818c0c8c 100644
--- a/basegraph.cpp
+++ b/basegraph.cpp
@@ -182,45 +182,37 @@ void setcameraangle(bool b) {
     }
   }
 
-void start_projection(int ed) {
-  glhr::new_projection();
-  glhr::projection_multiply(glhr::translate((vid.xcenter*2.)/vid.xres - 1, 1 - (vid.ycenter*2.)/vid.yres, 0));
+bool using_perspective;
 
-  if(ed) {
-    if(stereo::mode == stereo::sLR) {
-      glhr::projection_multiply(glhr::translate(ed * (stereo::eyewidth() - .5) * 4, 0, 0));
-      glhr::projection_multiply(glhr::scale(2, 1, 1));
-      }
-    else {
-      glhr::projection_multiply(glhr::translate(-ed * stereo::eyewidth(), 0, 0));
-      }
-    }
+void start_projection(int ed, bool perspective) {
+  glhr::new_projection();
+  using_perspective = perspective;
+
+  if(ed && stereo::mode == stereo::sLR) {
+    glhr::projection_multiply(glhr::translate(ed, 0, 0));
+    glhr::projection_multiply(glhr::scale(2, 1, 1));
+    }      
+
+  glhr::projection_multiply(glhr::translate((vid.xcenter*2.)/vid.xres - 1, 1 - (vid.ycenter*2.)/vid.yres, 0));
+  }
+
+void eyewidth_translate(int ed) {
+  if(ed) glhr::projection_multiply(glhr::translate(-ed * stereo::eyewidth(), 0, 0));
   }
 
 void stereo::set_projection(int ed) {
   DEBB(DF_GRAPH, (debugfile,"stereo::set_projection\n"));
   
-  start_projection(ed);
-  
-  if(pmodel && !stereo::active()) {
+  start_projection(ed, pmodel == mdDisk && !spherespecial);
 
+  if(!using_perspective) {
     glhr::projection_multiply(glhr::ortho(vid.xres/2, -vid.yres/2, abs(stereo::scrdist) + 30000));
-    }
-  else if(pmodel) {
-
-    ld right = vid.xres/2 / stereo::scrdist;
-    ld left = -right;
-    ld top = -vid.yres/2 / stereo::scrdist;
-    ld bottom = -top;
-
-    glhr::projection_multiply(glhr::frustum((right-left)/2, (top-bottom)/2));
-    
-    if(ed) glhr::projection_multiply(glhr::translate(stereo::ipd * vid.radius * ed/2, 0, 0));
-
-    glhr::projection_multiply(glhr::scale(1, 1, -1));
-    glhr::projection_multiply(glhr::translate(0, 0, stereo::scrdist));
-
-    stereo::scrdist_text = 0;
+    if(ed) {
+      glhr::glmatrix m = glhr::id;
+      m[2][0] -= ed;
+      glhr::projection_multiply(m);
+      }
+    glhr::id_modelview();
     }
   else {
 
@@ -233,6 +225,8 @@ void stereo::set_projection(int ed) {
       glhr::projection_multiply(glhr::scale(1,1,0));
       }
 
+    eyewidth_translate(ed);
+
     glhr::projection_multiply(glhr::frustum(vid.xres * 1. / vid.yres, 1));
 
     GLfloat sc = vid.radius / (vid.yres/2.);
@@ -323,6 +317,7 @@ void setGLProjection(int col) {
   GLERR("setGLProjection");
   
   stereo::set_projection(0);
+  
   GLERR("after set_projection");
   }
 
diff --git a/config.cpp b/config.cpp
index 652f133e..dafb1ef5 100644
--- a/config.cpp
+++ b/config.cpp
@@ -606,6 +606,8 @@ void showGraphConfig() {
     dialog::addSelItem(XLAT("line width"), fts(vid.linewidth), 'w');
 //    dialog::addBoolItem(XLAT("finer lines at the boundary"), vid.antialias & AA_LINEWIDTH, 'b');
     }
+  else
+    dialog::addBreak(100);
 
   #if CAP_FRAMELIMIT
   dialog::addSelItem(XLAT("framerate limit"), its(vid.framelimit), 'l');
diff --git a/hud.cpp b/hud.cpp
index 099e684d..0a5b1e48 100644
--- a/hud.cpp
+++ b/hud.cpp
@@ -377,13 +377,9 @@ void drawStats() {
 
   {
   dynamicval<eModel> pm(pmodel, mdDisk);
-  dynamicval<ld> va(vid.alpha, 1);
-  dynamicval<ld> vax(vid.alpha, 1);
   dynamicval<videopar> v(vid, vid);
-  calcparam();
-#if CAP_GL
-  stereo::set_projection(0);
-#endif
+  vid.alpha = vid.scale = 1;
+  calcparam(); set_projection(0);
 
   if(haveMobileCompass()) {
     initquickqueue();
@@ -504,11 +500,7 @@ void drawStats() {
       }
     }
   }
-
-  calcparam();
-#if CAP_GL
-  stereo::set_projection(0);
-#endif
+  calcparam(); stereo::set_projection(0);
   
   string s0;
   if(!peace::on) {
diff --git a/hyper.h b/hyper.h
index 4629a192..fe156a10 100644
--- a/hyper.h
+++ b/hyper.h
@@ -3714,5 +3714,7 @@ extern ld hexshift;
 extern bool noshadow, bright, nohelp, dont_face_pc;
 extern void switchHardcore();
 
+extern bool using_perspective;
+
 void generateAlts(heptagon *h, int levs = irr::on ? 1 : S3-3, bool link_cdata = true);
 }
diff --git a/hypgraph.cpp b/hypgraph.cpp
index 34d7b04c..d054f979 100644
--- a/hypgraph.cpp
+++ b/hypgraph.cpp
@@ -210,7 +210,7 @@ void applymodel(hyperpoint H, hyperpoint& ret) {
     if(!vid.camera_angle) {
       ret[0] = H[0] / tz;
       ret[1] = H[1] / tz;
-      ret[2] = vid.xres / vid.radius * stereo::eyewidth() / 2 - stereo::ipd / tz / 2;
+      ret[2] = vid.xres * stereo::eyewidth() / 2 / vid.radius - stereo::ipd / tz / 2;
       }
     else {
       ld tx = H[0];
@@ -221,7 +221,7 @@ void applymodel(hyperpoint H, hyperpoint& ret) {
       ld ux = tx, uy = ty * cc - ss * tz, uz = tz * cc + ss * ty;
       ret[0] = ux / uz;
       ret[1] = uy / uz;
-      ret[2] = vid.xres / vid.radius * stereo::eyewidth() / 2 - stereo::ipd / uz / 2;
+      ret[2] = vid.xres * stereo::eyewidth() / 2 / vid.radius - stereo::ipd / uz / 2;
       }
     return;
     }
diff --git a/polygons.cpp b/polygons.cpp
index d250bf20..f7b65711 100644
--- a/polygons.cpp
+++ b/polygons.cpp
@@ -149,7 +149,8 @@ int spherespecial, spherephase;
 void addpoint(const hyperpoint& H) {
   if(true) {
     hyperpoint Hscr;
-    applymodel(H, Hscr);
+    applymodel(H, Hscr); 
+    for(int i=0; i<3; i++) Hscr[i] *= vid.radius;
     if(vid.alpha + H[2] <= BEHIND_LIMIT && pmodel == mdDisk) poly_flags |= POLY_BEHIND;
     
     if(spherespecial) {
@@ -167,7 +168,6 @@ void addpoint(const hyperpoint& H) {
         Hscr[1] *= coef;
         }
       }
-    for(int i=0; i<3; i++) Hscr[i] *= vid.radius;
     add1(Hscr);
     }
   }
@@ -254,23 +254,6 @@ void glapplymatrix(const transmatrix& V) {
   glhr::set_modelview(glhr::as_glmatrix(mat));
   }
 
-void setmatrix(int useV, const transmatrix& V) {
-  if(useV == 1) {
-    glapplymatrix(V);
-    }
-  else if(useV == 3) {
-    GLfloat mat[16] = {
-      1, 0, 0, 0,
-      0, 1, 0, 0,
-      0, 0, GLfloat(stereo::mode ? -1 : 0), 0,
-      0, 0, stereo::scrdist, 1
-      };
-    glhr::set_modelview(glhr::as_glmatrix(mat));
-    }
-  else
-    glhr::id_modelview();
-  }
-
 #ifndef MINIMIZE_GL_CALLS
 #ifdef EMSCRIPTEN
 #define MINIMIZE_GL_CALLS 1
@@ -279,7 +262,7 @@ void setmatrix(int useV, const transmatrix& V) {
 #endif
 #endif
 
-void gldraw(int useV, const transmatrix& V, const vector<glvertex>& v, int ps, int pq, int col, int outline, int flags, textureinfo *tinf) {
+void gldraw(const transmatrix& V, const vector<glvertex>& v, int ps, int pq, int col, int outline, int flags, textureinfo *tinf) {
 
   if(tinf) {
     #if CAP_TEXTURE
@@ -307,7 +290,8 @@ void gldraw(int useV, const transmatrix& V, const vector<glvertex>& v, int ps, i
   for(int ed = stereo::active() ? -1 : 0; ed<2; ed+=2) {
     if(ed) stereo::set_projection(ed), stereo::set_viewport(ed);
     bool draw = col;
-    setmatrix(useV, V);
+    
+    if(using_perspective) glapplymatrix(V);
 
     if(draw) {
       if((flags & POLY_VCONVEX) && MINIMIZE_GL_CALLS) {
@@ -339,17 +323,18 @@ void gldraw(int useV, const transmatrix& V, const vector<glvertex>& v, int ps, i
           glStencilFunc( GL_NOTEQUAL, 1, 1);
           GLfloat xx = vid.xres;
           GLfloat yy = vid.yres;
+          GLfloat dist = using_perspective ? stereo::scrdist : 0;
           vector<glvertex> scr = {
-            make_array<GLfloat>(-xx, -yy, stereo::scrdist), 
-            make_array<GLfloat>(+xx, -yy, stereo::scrdist), 
-            make_array<GLfloat>(+xx, +yy, stereo::scrdist), 
-            make_array<GLfloat>(-xx, +yy, stereo::scrdist)
+            make_array<GLfloat>(-xx, -yy, dist), 
+            make_array<GLfloat>(+xx, -yy, dist), 
+            make_array<GLfloat>(+xx, +yy, dist), 
+            make_array<GLfloat>(-xx, +yy, dist)
             };
           glhr::vertices(scr);
           glhr::id_modelview();
           glDrawArrays(tinf ? GL_TRIANGLES : GL_TRIANGLE_FAN, 0, 4);
           glhr::vertices(v);
-          setmatrix(useV, V);
+          if(using_perspective) glapplymatrix(V);
           }
         else { 
           glStencilOp( GL_ZERO, GL_ZERO, GL_ZERO);
@@ -617,9 +602,9 @@ void drawpolyline(polytodraw& p) {
     }
 
 #if CAP_GL
-  if(vid.usingGL && pmodel == mdDisk && !spherespecial) {
+  if(vid.usingGL && using_perspective) {
     glLineWidth(linewidthat(tC0(pp.V), pp.minwidth));
-    gldraw(1, pp.V, *pp.tab, pp.offset, pp.cnt, p.col, pp.outline, pp.flags &~ POLY_INVERSE, pp.tinf);
+    gldraw(pp.V, *pp.tab, pp.offset, pp.cnt, p.col, pp.outline, pp.flags &~ POLY_INVERSE, pp.tinf);
     return;
     }
 #endif
@@ -718,11 +703,11 @@ void drawpolyline(polytodraw& p) {
         for(int i=0; i<pp.cnt; i++)
           tv.push_back(pp.tinf->tvertices[pp.offset+i]);
         swap(pp.tinf->tvertices, tv);
-        gldraw(3, Id, glcoords, 0, isize(glcoords), p.col, pp.outline, poly_flags, pp.tinf);
+        gldraw(Id, glcoords, 0, isize(glcoords), p.col, pp.outline, poly_flags, pp.tinf);
         swap(pp.tinf->tvertices, tv);
         }
       else
-        gldraw(3, Id, glcoords, 0, isize(glcoords), nofill ? 0 : p.col, pp.outline, poly_flags, nofill ? NULL : pp.tinf);
+        gldraw(Id, glcoords, 0, isize(glcoords), nofill ? 0 : p.col, pp.outline, poly_flags, nofill ? NULL : pp.tinf);
       continue;
       }
   #endif
@@ -914,10 +899,11 @@ void sortquickqueue() {
   }
 
 void quickqueue() {
-  spherespecial = 0;
+  spherespecial = 0; stereo::set_projection(0);
   int siz = isize(ptds);
   setcameraangle(false);
   for(int i=0; i<siz; i++) drawqueueitem(ptds[i]);
+  ptds.clear();
   }
 
 ld xintval(const hyperpoint& h) {
@@ -935,7 +921,7 @@ void drawqueue() {
   int siz = isize(ptds);
 
   setcameraangle(true);
-
+  
 #if CAP_GL
   if(vid.usingGL) 
     glClear(GL_STENCIL_BUFFER_BIT);
@@ -1004,6 +990,8 @@ void drawqueue() {
 
   spherespecial = 0;
   spherephase = 0;
+  stereo::set_projection(0);
+  
   // on the sphere, parts on the back are drawn first
   if(sphere && pmodel == 0) {
 
@@ -1015,6 +1003,8 @@ void drawqueue() {
       }
     
     spherespecial = sphereflipped() ? 1 : -1;
+    stereo::set_projection(0);
+
     #ifndef STLSORT
     for(int p: {PPR_REDWALLs, PPR_REDWALLs2, PPR_REDWALLs3, PPR_WALL3s,
       PPR_LAKEWALL, PPR_INLAKEWALL, PPR_BELOWBOTTOM}) 
@@ -1039,6 +1029,7 @@ void drawqueue() {
     #endif
     spherespecial *= -1;
     spherephase = 1;
+    stereo::set_projection(0);
     }
   for(int i=0; i<siz; i++) {
     GET_PTD(i);
diff --git a/rug.cpp b/rug.cpp
index 2a673e26..30152226 100644
--- a/rug.cpp
+++ b/rug.cpp
@@ -1285,7 +1285,9 @@ void drawRugScene() {
     if(ed == 1 && stereo::mode == stereo::sAnaglyph)
       glClear(GL_DEPTH_BUFFER_BIT);
     
-    start_projection(ed);
+    start_projection(ed, true);
+    eyewidth_translate(ed);
+
     if(stereo::mode == stereo::sODS) {
       glhr::projection_multiply(glhr::ortho(M_PI, M_PI, 100)); // 2*M_PI));
       }
diff --git a/shaders.cpp b/shaders.cpp
index cc68dec4..c9dedfc6 100644
--- a/shaders.cpp
+++ b/shaders.cpp
@@ -406,6 +406,7 @@ void switch_mode(eMode m) {
   mode = m;
   GLERR("after_switch_mode");
   current_vertices = NULL;
+  id_modelview();
   }
 
 void fog_max(ld fogmax) {