diff --git a/Fonderie/Makefile b/Fonderie/Makefile
index 8c38d8c..deb910b 100644
--- a/Fonderie/Makefile
+++ b/Fonderie/Makefile
@@ -52,7 +52,7 @@ crapstr.h:	crapulors.liste Makefile craplist2str.awk
 crapulator.o:	crapulator.c ${DEPS} Makefile
 	gcc ${COPT} -c $<
 
-fonctions.o:	fonctions.c fonctions.h Makefile
+fifo.o:	fifo.c fifo.h Makefile
 	gcc ${COPT} -c $<
 
 sfx.o:	sfx.c ${DEPS} Makefile
diff --git a/Fonderie/fifo.c b/Fonderie/fifo.c
index 2566ecc..3b99890 100644
--- a/Fonderie/fifo.c
+++ b/Fonderie/fifo.c
@@ -19,7 +19,8 @@
  */
 extern	int		verbosity;
 
-/*	private vars of this module - it was very dirty
+/*	private vars of this module - it was very dirty,
+ *	but simple and efficient.
  */
 static	A_Fifo		g_fifo;
 
@@ -45,6 +46,11 @@ int faire_la_somme(A_Fifo *pfifo, FloatImg *destination, int step)
 int		idx, foo;
 FloatImg	*pdest;
 
+#if DEBUG_LEVEL
+fprintf(stderr, ">>> %s ( %p %p %d )\n", __func__,
+				pfifo, destination, step);
+#endif
+
 if (NULL==destination) {
 	pdest = &(pfifo->total);		}
 else	{
@@ -62,24 +68,26 @@ for (idx=0; idx<pfifo->nbslots; idx += step) {
 		}
 	}
 
-fprintf(stderr, "*** %s %s writing debug file ***\n",
+/* XXX
+fprintf(stderr, "*** %s:%s writing debugB file ***\n",
 			__FILE__, __func__);
 fimg_dump_to_file(&g_fifo.total, "debugB.fimg", 0);
+XXX */
 
 return 0;
 }
 /* -------------------------------------------------------------- */
 /*			called by 'fonderie.c'
- *	this func save the fifo content as
- *	  - float     FIMG
- *	  - 16 bits   PNM
- *	  - 8 bits    PNG
  */
 int export_fifo(char *fname, int step)
 {
 int		foo, type;
 
-foo = faire_la_somme(&g_fifo, NULL, step);
+#if DEBUG_LEVEL
+fprintf(stderr, ">>> %s ( '%s' %d )\n", __func__, fname, step);
+#endif
+
+foo = faire_la_somme(&g_fifo, NULL, 1);
 
 foo = filterstack_run(1, &g_fifo.total, 0);
 if (foo) {
@@ -88,24 +96,7 @@ if (foo) {
 	return foo;
 	}
 
-type = format_from_extension(fname);
-switch (type) {
-	case FILE_TYPE_PNG:
-		foo = fimg_save_as_png(&g_fifo.total, fname, 0);
-		break;
-	case FILE_TYPE_PNM:
-		foo = fimg_save_as_pnm(&g_fifo.total, fname, 0);
-		break;
-	case FILE_TYPE_FIMG:
-		foo = fimg_dump_to_file(&g_fifo.total, fname, 0);
-		break;
-	default:
-		fprintf(stderr, "%s : type of '%s' unknow\n",
-				__func__, 	fname);
-		foo = 888;
-		break;
-	}
-
+foo = fimg_export_picture(&g_fifo.total, fname, 0);
 if (foo) {
 	fprintf(stderr, "ERR EXPORT '%s' is %d\n", fname, foo);
 	exit(3);
@@ -117,7 +108,11 @@ return 0;
 int insert_picture(FloatImg *src)
 {
 FloatImg	*dst;
-int		nbre;
+int		nbre, foo;
+
+#if DEBUG_LEVEL
+fprintf(stderr, ">>> %s ( %p )\n", __func__, src);
+#endif
 
 dst = &g_fifo.slots[g_fifo.next];
 
@@ -126,9 +121,12 @@ memcpy(dst->R, src->R, nbre);
 memcpy(dst->G, src->G, nbre);
 memcpy(dst->B, src->B, nbre);
 
-fprintf(stderr, "*** %s %s writing debug file ***\n",
+/* XXX
+fprintf(stderr, "*** %s:%s writing debugA file ***\n",
 			__FILE__, __func__);
-fimg_dump_to_file(dst, "debugA.fimg", 0);
+foo = fimg_dump_to_file(dst, "debugA.fimg", 0);
+fprintf(stderr, "    ok file dumped %d\n", foo);
+XXX */
 
 g_fifo.next++;  g_fifo.next %= g_fifo.nbslots;
 
diff --git a/Fonderie/fonderie.c b/Fonderie/fonderie.c
index ecc8541..9eaa639 100644
--- a/Fonderie/fonderie.c
+++ b/Fonderie/fonderie.c
@@ -17,12 +17,19 @@
 int			verbosity;
 
 /* -------------------------------------------------------------- */
-int traite_une_image(FloatImg *image, int step, char *outd)
+/*
+ *	this is the real worker ? or just a wrapper ?
+ */
+int traite_une_image(FloatImg *image, char *outd)
 {
 static int		numero;
 int			foo;
 char			ligne[200];
 
+#if DEBUG_LEVEL
+fprintf(stderr, "\n>>> %s ( %p '%s' )\n", __func__, image, outd);
+#endif
+
 /* here, we put the picz in the fifo machinery */
 foo = insert_picture(image);
 if (foo) {
@@ -30,46 +37,33 @@ if (foo) {
 	return foo;
 	}
 
+/* and now, we pull the result on the magic computation
+ */
 sprintf(ligne, "%s/%05d.png", outd, numero);
-foo = export_fifo(ligne, step);
+if (verbosity > 1) fprintf(stderr, "    exporting to '%s'\n", ligne);
+
+foo = export_fifo(ligne, 1);
 if (foo) {
 	fprintf(stderr, "%s: err %d on export\n", __func__, foo);
 	return foo;
 	}
 numero++;			/* VERY IMPORTANT :) */
+
 return 0;
 }
 /* -------------------------------------------------------------- */
-int insert_blank(FloatImg *image, int nbre, float fval, char *outd)
+int insert_blank(FloatImg *image, int nbre, 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);
+fprintf(stderr, ">>> %s ( %p  %d  '%s' )\n", __func__,
+			image, nbre, outd);
 #endif
 
-if (NULL != (fname=getenv("BLANK_FIMG"))) {
-	fprintf(stderr,"%s: try to load %s\n", __func__, 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++) {
-	if (preloaded) {
-		fimg_copy_data(&blank, image);
-		}
-	if ((foo=traite_une_image(image, 1, outd))) {
+	if ((foo=traite_une_image(image, outd))) {
 		fprintf(stderr, "%s : err %d from 'traite_une_image'\n",
 				__func__, foo);
 		break;
@@ -78,10 +72,6 @@ for (idx=0; idx<nbre; idx++) {
 	}
 puts("");
 
-if (preloaded) {
-	fimg_destroy(&blank);
-	}
-
 return 0;
 }
 /* -------------------------------------------------------------- */
@@ -98,8 +88,8 @@ float			maxvalue;
 int			datas[3];
 
 #if DEBUG_LEVEL
-fprintf(stderr, ">>> %s ( '%s' -> '%s'  %d  eff:%d:%d)\n", __func__,
-			pattern, outdir, szfifo, infx, outfx);
+fprintf(stderr, "\n>>> %s ( '%s' -> '%s'  %d )\n", __func__,
+			pattern, outdir, szfifo);
 #endif
 
 if (1 != step) fprintf(stderr, "\tstep is %d\n", step);
@@ -137,12 +127,14 @@ foo = create_fifo(szfifo, width, height, FIMG_TYPE_RGB);
 fprintf(stderr, "init fifo (%d slots) --> %d\n", szfifo, foo);
 
 /* XXX inject a few strange pics in the fifo */
-insert_blank(&input, blk, maxvalue, outdir);
+insert_blank(&input, blk, outdir);
 
 for (idx=0; idx<globbuf.gl_pathc; idx++) {
+
 	cptr = globbuf.gl_pathv[idx];
 	/* first step : read the current grabed picz from disk,
 	   and put it in our private buffer */
+	// fprintf(stderr, "\n######### loading '%s'\n", cptr);
 	foo = fimg_load_from_dump(cptr, &input);
 	if (foo) {
 		fprintf(stderr, "load #%d from dump -> %d\n", idx, foo);
@@ -155,7 +147,7 @@ for (idx=0; idx<globbuf.gl_pathc; idx++) {
 		fprintf(stderr, "%s: input filter -> %d\n", __func__, foo);
 		exit(1);
 		}
-	foo = traite_une_image(&input, step, outdir);
+	foo = traite_une_image(&input, outdir);
 
 	if (foo) {
 		fprintf(stderr, "traitement %s -> %d WTF?\n", cptr, foo);
@@ -166,7 +158,7 @@ for (idx=0; idx<globbuf.gl_pathc; idx++) {
 
 fputs("\n", stderr);
 
-insert_blank(&input, blk, maxvalue, outdir);
+insert_blank(&input, blk, outdir);
 
 /*
  *		PLEASE, FLUSH THE FIFO !
diff --git a/Fonderie/glitches.c b/Fonderie/glitches.c
index 40f0a4e..7f9033e 100644
--- a/Fonderie/glitches.c
+++ b/Fonderie/glitches.c
@@ -45,7 +45,7 @@ int kill_a_random_line(FloatImg *pvictime, float fval, int bits)
 int		line, xpos, offset;
 float		ftmp;
 
-#if DEBUG_LEVEL
+#if DEBUG_LEVEL > 1
 fprintf(stderr, ">>> %s ( %p %d )\n", __func__, pvictime, bits);
 #endif