diff --git a/Fonderie/fonctions.c b/Fonderie/fonctions.c
index 80fba59..878f528 100644
--- a/Fonderie/fonctions.c
+++ b/Fonderie/fonctions.c
@@ -120,10 +120,6 @@ int insert_picture(FloatImg *src)
 FloatImg	*dst;
 int		nbre;
 
-/*
- * this is the where we can insert the 'input filter'
- */
-
 dst = &g_fifo.slots[g_fifo.next];
 
 nbre = dst->width * dst->height * sizeof(float);
diff --git a/Fonderie/fonderie.c b/Fonderie/fonderie.c
index 5f9e94d..3136e4b 100644
--- a/Fonderie/fonderie.c
+++ b/Fonderie/fonderie.c
@@ -43,20 +43,49 @@ int insert_blank(FloatImg *image, int nbre, int pproc,
 						float fval, char *outd)
 {
 int		idx, foo;
+int		preloaded = 0;
+FloatImg	blank;
+char		*fname;
+
+#if DEBUG_LEVEL
+fprintf(stderr, ">>> %s ( %p %d %d %f '%s' )\n", __func__,
+			image, nbre, pproc, fval, outd);
+#endif
+
+if (NULL != (fname=getenv("BLANK_FIMG"))) {
+	fprintf(stderr,"try to load %s\n", fname);
+	fimg_clone(image, &blank, 1);
+	foo = fimg_load_from_dump(fname, &blank);
+	if (foo) {
+		fprintf(stderr, "epic fail %d on %s\n", foo, fname);
+		exit(1);
+		}
+	if (verbosity)	fimg_describe(&blank, "Blank pic");
+	preloaded = 1;
+	}
 
 fimg_clear(image);
 for (idx=0; idx<nbre; idx++) {
-	fimg_vdeg_a(image, fval);
-	// brotche_rand48_b(image, drand48()*0.10, 1e5);
+	if (preloaded) {
+		fimg_copy_data(&blank, image);
+		}
+	else {
+		fimg_hdeg_a(image, fval);
+		}
+
 	if ((foo=traite_une_image(image, pproc, 1, outd))) {
 		fprintf(stderr, "%s : err %d from 'traite_une_image'\n",
 				__func__, foo);
 		break;
 		}
-	printf("\t%c\r", "ABCDEF"[idx%6]);  fflush(stdout);
+	printf("\t%c\r", "ABCDEFGH"[idx%8]);  fflush(stdout);
 	}
 puts("");
 
+if (preloaded) {
+	fimg_destroy(&blank);
+	}
+
 return 0;
 }
 /* -------------------------------------------------------------- */