diff --git a/drawing.cpp b/drawing.cpp
index b60229ea..21f11d8d 100644
--- a/drawing.cpp
+++ b/drawing.cpp
@@ -1386,7 +1386,12 @@ EX namespace ods {
 
 void dqi_poly::draw() {
   if(flags & POLY_DEBUG) debug_this();
-  
+  if(debugflags & DF_VERTEX) {
+    println(hlog, tie(band_shift, V, offset, cnt, offset_texture, outline, linewidth, flags, intester, cache), (cell*) tinf);
+    for(int i=0; i<cnt; i++) print(hlog, (*tab)[i]);
+    println(hlog);
+    }
+
   #if CAP_ODS  
   if(vid.stereo_mode == sODS) {
     ods::draw_ods(this);
@@ -2007,17 +2012,20 @@ EX void draw_main() {
       }
     }
   else {
+    DEBB(DF_GRAPH, ("draw_main1"));
     if(ray::in_use && !ray::comparison_mode) {
       ray::cast();
       reset_projection();
       }
 
+    DEBB(DF_GRAPH, ("outcircle"));
     for(auto& ptd: ptds) if(ptd->prio == PPR::OUTCIRCLE)
       ptd->draw();
     
     if(two_sided_model()) draw_backside();
   
     for(auto& ptd: ptds) if(ptd->prio != PPR::OUTCIRCLE) {
+      DEBBI(DF_VERTEX, ("prio: ", int(ptd->prio), " color ", ptd->color));
       dynamicval<int> ss(spherespecial, among(ptd->prio, PPR::MOBILE_ARROW, PPR::OUTCIRCLE, PPR::CIRCLE) ? 0 : spherespecial);
       ptd->draw();
       }
diff --git a/hprint.cpp b/hprint.cpp
index 65f1b1a0..e69a1b4b 100644
--- a/hprint.cpp
+++ b/hprint.cpp
@@ -25,7 +25,8 @@ EX FILE *debugfile;
 #define DF_GP             2048
 #define DF_POLY           4096
 #define DF_LOG            8192
-#define DF_KEYS "imwesxufgbtopl"
+#define DF_VERTEX        16384
+#define DF_KEYS "imwesxufgbtoplv"
 #endif
 
 EX int debugflags = DF_INIT | DF_ERROR | DF_WARN | DF_MSG | DF_TIME | DF_LOG;