diff --git a/bigstuff.cpp b/bigstuff.cpp
index 94b39388..107a9e31 100644
--- a/bigstuff.cpp
+++ b/bigstuff.cpp
@@ -1376,6 +1376,7 @@ EX int wallchance(cell *c, bool deepOcean) {
 /** \brief should we generate the horocycles in the current geometry? */
 EX bool horo_ok() {  
   if(INVERSE) return false;
+  if(currentmap->strict_tree_rules()) return false;
   return hyperbolic && !bt::in() && !arcm::in() && !kite::in() && !experimental && !hybri && !arb::in() && !quotient;
   }
 
@@ -1929,6 +1930,7 @@ EX void gen_temple(cell *c) {
   }
 
 EX void moreBigStuff(cell *c) {
+  if(currentmap->strict_tree_rules()) return;
 
   if((bearsCamelot(c->land) && !euclid && !quotient && !nil) || c->land == laCamelot) 
   if(have_alt(c)) if(!(bt::in() && specialland != laCamelot)) 
diff --git a/cell.cpp b/cell.cpp
index 827f7c5e..fc63ba06 100644
--- a/cell.cpp
+++ b/cell.cpp
@@ -59,6 +59,8 @@ struct hrmap {
   virtual transmatrix spin_from(cell *c, int d, ld bonus=0);
   
   virtual double spacedist(cell *c, int i) { return hdist0(tC0(adj(c, i))); }
+  
+  virtual bool strict_tree_rules() { return false; }
 
   virtual void find_cell_connection(cell *c, int d);
   virtual int shvid(cell *c) { return 0; }
diff --git a/floorshapes.cpp b/floorshapes.cpp
index 939516f3..deaaeb0f 100644
--- a/floorshapes.cpp
+++ b/floorshapes.cpp
@@ -974,6 +974,8 @@ EX struct dqi_poly *draw_shapevec(cell *c, const shiftmatrix& V, const vector<hp
   if(no_wall_rendering) return NULL;
   if(!c) return &queuepolyat(V, shv[0], col, prio);
   else if(WDIM == 3) return NULL;
+  else if(currentmap->strict_tree_rules()) return &queuepolyat(V, shv[shvid(c)], col, prio);
+
   #if CAP_GP
   else if(GOLDBERG) {
     int id = gp::get_plainshape_id(c);
diff --git a/pattern2.cpp b/pattern2.cpp
index 346bd47b..63033276 100644
--- a/pattern2.cpp
+++ b/pattern2.cpp
@@ -895,7 +895,7 @@ EX namespace patterns {
     }
 
   void val_all(cell *c, patterninfo &si, int sub, int pat) {
-    if(IRREGULAR || arcm::in() || bt::in() || arb::in() || WDIM == 3) si.symmetries = c->type;
+    if(IRREGULAR || arcm::in() || bt::in() || arb::in() || WDIM == 3 || currentmap->strict_tree_rules()) si.symmetries = c->type;
     else if(a46) val46(c, si, sub, pat);
     else if(a38) val38(c, si, sub, pat);
     else if(S7 < 6 && S3 == 3 && !INVERSE && !kite::in()) valSibling(c, si, sub, pat);
@@ -1088,6 +1088,8 @@ EX namespace patterns {
       if(sub & SPF_EXTRASYM) si.reflect = true;
       return si;
       }
+    
+    if(currentmap->strict_tree_rules()) return si;
 
     if(arb::in()) {
       si.id = arb::id_of(c->master);
@@ -2680,6 +2682,12 @@ EX namespace linepatterns {
 
   linepattern patTree("underlying tree", 0x00d0d000, cheating, 
     ALLCELLS(
+
+      if(currentmap->strict_tree_rules()) {
+        gridlinef(V, C0, V * currentmap->adj(c, 0), C0, col, 2 + vid.linequality); continue;
+        return;
+        }
+
       if(is_master(c)) {
         int dir = updir(c->master);
         if(dir == -1) continue;