diff --git a/Source/smokeview/IOboundary.c b/Source/smokeview/IOboundary.c
index 41bd98908..21205edec 100644
--- a/Source/smokeview/IOboundary.c
+++ b/Source/smokeview/IOboundary.c
@@ -971,18 +971,26 @@ void GetPatchSizes1(FILE_m **stream, const char *patchfilename, unsigned char *b
 }
 
 // !  ------------------ GetPatchSizes2 ------------------------
-
+//#define pp_PATCH_DEBUG
 void GetPatchSizes2(FILE_m *stream, int npatch, int nmeshes_arg, int *npatchsize, patchfacedata *patchfaceinfo, int *headersize, int *framesize){
   int ijkp[9] = {0};
 
   *npatchsize = 0;
 
   int n;
+#ifdef pp_PATCH_DEBUG
+  FILE *fstream = fopen("patches.csv", "w");
+  if(fstream!=NULL)fprintf(fstream,"patch index,i1,i2,j1,j2,k1,k2,dir,obst_index,mesh_index\n");
+#endif
   for(n = 0; n < npatch; n++){
     patchfacedata *pfi;
     int obst_index, mesh_index;
 
     fseek_m(stream, 4, SEEK_CUR); fread_m(ijkp, sizeof(*ijkp), 9, stream); fseek_m(stream, 4, SEEK_CUR);
+#ifdef pp_PATCH_DEBUG
+    if(fstream!=NULL)fprintf(fstream,"%i,%i, %i, %i, %i, %i, %i, %i, %i, %i\n",
+      n + 1, ijkp[0], ijkp[1], ijkp[2], ijkp[3], ijkp[4], ijkp[5], ijkp[6], ijkp[7], ijkp[8]);
+#endif
     pfi = patchfaceinfo + n;
     memcpy(pfi->ib, ijkp, 6 * sizeof(int));
     pfi->dir      = ijkp[6];
@@ -1006,6 +1014,9 @@ void GetPatchSizes2(FILE_m *stream, int npatch, int nmeshes_arg, int *npatchsize
   *headersize += npatch * 4;
   *framesize = 8 + 4 + 8 * npatch + (*npatchsize) * 4;
 
+#ifdef pp_PATCH_DEBUG
+  if(fstream!=NULL)fclose(fstream);
+#endif
   return;
 }
 /* ------------------ DrawFace ------------------------ */
@@ -3222,7 +3233,7 @@ void DrawBoundaryCellCenter(const meshdata *meshi){
     if(pfi->type==INTERIORwall)drawit = 1;
     if(pfi->obst == NULL && pfi->internal_mesh_face==1)drawit = 0;
 #ifdef pp_BNDF_DEBUG
-    if(bndf_vis_patch[n] == 0)drawit = 0;
+    if(n < NPATCHES_DEBUG && bndf_vis_patch[n] == 0)drawit = 0;
 #endif
     if(drawit==1){
       nrow = pfi->nrow;
@@ -3304,7 +3315,7 @@ void DrawBoundaryCellCenter(const meshdata *meshi){
       }
     }
 #ifdef pp_BNDF_DEBUG
-    if(bndf_vis_patch[n] == 0)drawit = 0;
+    if(n<NPATCHES_DEBUG && bndf_vis_patch[n] == 0)drawit = 0;
 #endif
     if(pfi->obst == NULL && pfi->internal_mesh_face==1)drawit = 0;
     if(drawit==1){
@@ -3381,7 +3392,7 @@ void DrawBoundaryCellCenter(const meshdata *meshi){
     }
     if(pfi->obst == NULL && pfi->internal_mesh_face==1)drawit = 0;
 #ifdef pp_BNDF_DEBUG
-    if(bndf_vis_patch[n] == 0)drawit = 0;
+    if(n < NPATCHES_DEBUG && bndf_vis_patch[n] == 0)drawit = 0;
 #endif
     if(drawit==1){
       nrow = pfi->nrow;