diff --git a/.gitignore b/.gitignore
index c4e25230..e95e0352 100644
--- a/.gitignore
+++ b/.gitignore
@@ -66,6 +66,7 @@ tools/*.tiff
 Fonderie/*.o
 Fonderie/*.png
 Fonderie/*.pnm
+Fonderie/*.gif
 Fonderie/fonderie
 Fonderie/interpolator
 Fonderie/t
diff --git a/Fonderie/Makefile b/Fonderie/Makefile
index 9530ddee..67f209de 100644
--- a/Fonderie/Makefile
+++ b/Fonderie/Makefile
@@ -7,7 +7,7 @@ COPT = -g -fpic -no-pie -Wall -DDEBUG_LEVEL=0 -Werror=parentheses
 LIBS = ../libfloatimg.a -lpnglite -lm 
 
 OBJS = fonctions.o sfx.o crapulator.o glitches.o metriques.o
-DEPS = fonctions.h crapulator.h metriques.h glitches.h
+DEPS = fonctions.h crapulator.h metriques.h glitches.h sfx.h
 
 all:	fonderie interpolator t
 
diff --git a/Fonderie/crapulator.c b/Fonderie/crapulator.c
index 2ac41bbb..97ea2fdc 100644
--- a/Fonderie/crapulator.c
+++ b/Fonderie/crapulator.c
@@ -10,6 +10,7 @@
 #include  "fonctions.h"
 #include  "crapulator.h"
 #include  "glitches.h"
+#include  "sfx.h"
 
 /* -------------------------------------------------------------- */
 static int effect_3(FloatImg *image)
@@ -122,13 +123,16 @@ switch (idFx) {
 	case 11:
 		retval = trinarize(image, 0);
 		break;
+	case 12:
+		retval = fimg_lissage_2x2(image);
+		break;
 	case 24:			/* experiment ! */
 		retval = des_bords_sombres_a(image, 160);
 		break;
 	case 25:
 		/* please make this function more tweakable */
-		retval = vertical_singlitch(image, 290+rand()%35,
-							fval, 0.18, 0);
+		retval = vertical_singlitch(image, 290+rand()%45,
+							fval, 0.19, 0);
 		break;
 	default :
 		fprintf(stderr, "%s : effect #%d invalid\n", 
diff --git a/Fonderie/fonctions.h b/Fonderie/fonctions.h
index 3a9baab3..523ca736 100644
--- a/Fonderie/fonctions.h
+++ b/Fonderie/fonctions.h
@@ -37,16 +37,5 @@ int create_fifo(int nbslot, int w, int h, int t);
 
 /* -------------------------------------------------------------- */
 /*
- *		funcs in 'sfx.c'
+ *		funcs in 'sfx.c'  ---> sfx.h
  */
-
-int des_bords_sombres_a(FloatImg *pimg, int offset);
-int trinarize(FloatImg *pimg, int notused);
-int binarize(FloatImg *pimg, int notused);
-
-int brotche_rand48_a(FloatImg *fimg, float ratio, float mval);
-int brotche_rand48_b(FloatImg *fimg, float ratio, float mval);
-int colors_brotcher(FloatImg *fimg, float fval);
-
-/* -------------------------------------------------------------- */
-
diff --git a/Fonderie/sfx.c b/Fonderie/sfx.c
index fe6b75d3..0d49249e 100644
--- a/Fonderie/sfx.c
+++ b/Fonderie/sfx.c
@@ -8,9 +8,10 @@
 #include  <stdlib.h>
 #include  <malloc.h>
 
-#include  <floatimg.h>
+#include  "../floatimg.h"
 
 #include  "fonctions.h"
+#include  "sfx.h"
 
 /* -------------------------------------------------------------- */
 /*	here are global vars exported by the main module
@@ -72,25 +73,23 @@ mBb = (mm[5] - mm[4]) * 0.66666;
 
 size = pimg->width * pimg->height;
 
-#define VAL	(255.0)
-
 for (foo=0; foo<size; foo++) {
 
 	fptr = pimg->R;
 	if (fptr[foo] < mRa || fptr[foo] > mRb)
-		fptr[foo] = 0.0;
+		fptr[foo] = mm[0];
 	else
 		fptr[foo] = mm[1];
 
 	fptr = pimg->G;
 	if (fptr[foo] < mGa || fptr[foo] > mGb)
-		fptr[foo] = 0.0;
+		fptr[foo] = mm[2];
 	else
 		fptr[foo] = mm[3];
 
 	fptr = pimg->B;
 	if (fptr[foo] < mBa || fptr[foo] > mBb)
-		fptr[foo] = 0.0;
+		fptr[foo] = mm[4];
 	else
 		fptr[foo] = mm[5];
 
diff --git a/Fonderie/sfx.h b/Fonderie/sfx.h
new file mode 100644
index 00000000..9e14405a
--- /dev/null
+++ b/Fonderie/sfx.h
@@ -0,0 +1,15 @@
+/*
+ *	sfx.h - special effects for fonderie & interpolator
+ */
+
+
+int des_bords_sombres_a(FloatImg *pimg, int offset);
+
+int trinarize(FloatImg *pimg, int notused);	// in sfx.c
+
+int binarize(FloatImg *pimg, int notused);
+
+int brotche_rand48_a(FloatImg *fimg, float ratio, float mval);
+int brotche_rand48_b(FloatImg *fimg, float ratio, float mval);
+int colors_brotcher(FloatImg *fimg, float fval);
+