diff --git a/floatimg.h b/floatimg.h
index 59c0e31..4412db9 100644
--- a/floatimg.h
+++ b/floatimg.h
@@ -20,7 +20,7 @@
  *	https://git.tetalab.org/tTh/FloatImg
  */
 
-#define		FIMG_VERSION	(212)
+#define		FIMG_VERSION	(218)
 #define		RELEASE_NAME	("noname")
 
 /* XXX add a test for stdint.h / uint32_t XXX */
@@ -174,6 +174,7 @@ int fimg_binarize(FloatImg *pimg, int notused);
 int fimg_trinarize(FloatImg *pimg, int notused);
 
 /*	 module sfx3.c			*/
+int fimg_make_rndfluffy_lines(FloatImg *src, FloatImg *dst, int rndt);
 int fimg_crump_hard(FloatImg *src, FloatImg *dst, float kval, int notused);
 
 /*	 module sfx4.c			*/
diff --git a/funcs/sfx3.c b/funcs/sfx3.c
index c21e542..148401f 100644
--- a/funcs/sfx3.c
+++ b/funcs/sfx3.c
@@ -9,6 +9,7 @@
 
 #include  <stdio.h>
 #include  <string.h>
+#include  <stdlib.h>
 #include  <stdint.h>
 #include  <sys/time.h>
 
@@ -16,6 +17,45 @@
 
 extern int		verbosity;
 
+/* -------------------------------------------------------------- */
+/* new    Sun 29 Jan 2023 10:01:39 PM CET
+
+*/
+int fimg_make_rndfluffy_lines(FloatImg *src, FloatImg *dst, int rndt)
+{
+int		x, y, ol;
+float		accu;
+
+// #if DEBUG_LEVEL
+fprintf(stderr, ">>> %s ( '%p'  '%p'  %d )\n", __func__,
+				src, dst, rndt);
+// #endif
+
+if (fimg_images_not_compatible(src, dst)) {
+	/* be hard for the lamers */
+	fprintf(stderr, "compatibility OUPS in %s\n", __func__);
+	abort();
+	}
+
+for (y=0; y<src->height; y++) {
+	ol = y * src->width;
+	if (rndt < (rand() % 100)) {
+		accu = 0.0;
+		for (x=0; x<src->width; x++)	accu += src->R[ol + x];
+		accu /= (float)src->width;
+		for (x=0; x<src->width; x++)	dst->R[ol + x] = accu;
+		}
+	else	{
+		for (x=0; x<src->width; x++) {
+			dst->R[ol+x] = src->R[ol+x];
+			dst->G[ol+x] = src->G[ol+x];
+			dst->B[ol+x] = src->B[ol+x];
+			}
+		}
+	}
+
+return 0;
+}
 /* -------------------------------------------------------------- */
 int fimg_crump_hard(FloatImg *src, FloatImg *dst, float kval, int notused)
 {
diff --git a/funcs/t.c b/funcs/t.c
index 93f1140..fdc3879 100644
--- a/funcs/t.c
+++ b/funcs/t.c
@@ -26,7 +26,7 @@ enum nCmd { Equalize=1, Rotate, Sfx0, F3x3, MIRE, Wfits, Wpng, Wtiff,
 			Geometrie, FileType, Mirror, KillRGB,
 			Pixelize,SplitLevel, DecompRgbz, DecompRgbg,
 			Rectangle, Dicom, Fakolor0, Fakolor3,
-			Fmorpho0  };
+			Fmorpho0, Fluffy  };
 typedef struct {
 	char	*name;
 	int	Cmd;
@@ -64,6 +64,7 @@ Command commands[] = {
 	{ "fakolor0",	Fakolor0	},
 	{ "fakolor3",	Fakolor3	},
 	{ "fmorpho0",	Fmorpho0	},
+	{ "fluffy",	Fluffy		},
 	{ NULL,		0		}
 	} ;
 
@@ -262,6 +263,9 @@ switch(opt) {
 	case Fmorpho0:
 		foo = essai_fmorpho_0(filename, "/tmp/fmorpho", 0);
 		break;
+	case Fluffy:
+		foo = essai_rndfluffy(filename, outfile, 0);
+		break;
 	default:
 		fprintf(stderr, "'%s' is a bad command\n", command);
 		exit(1);
diff --git a/funcs/tests.c b/funcs/tests.c
index 25e68be..4819f18 100644
--- a/funcs/tests.c
+++ b/funcs/tests.c
@@ -27,7 +27,6 @@ extern int		verbosity;
 /*
  *	nouveau 30 octobre 2022     --> fmorpho.c
  */
-
 int essai_fmorpho_0(char *infile, char *basefname, int k)
 {
 FloatImg	src, dst;
@@ -318,6 +317,42 @@ if (foo) {
 return 0;
 }
 /* --------------------------------------------------------------------- */
+/* new  Sun Feb 12 10:34:06 CET 2023 
+ */
+int essai_rndfluffy(char *infile, char *outfile, int k)
+{
+int		foo;
+FloatImg	src, dst;
+
+fprintf(stderr, ">>> %s ( '%s'  '%s'  %d )\n", __func__,
+			infile, outfile, k);
+
+foo = fimg_create_from_dump(infile, &src);
+if (0 != foo) {
+	fprintf(stderr, "%s: err %d loading image '%s'\n", __func__,
+				foo, 		infile);
+	return foo;
+	}
+fprintf(stderr, "    %s loaded.\n", infile);
+
+fimg_clone(&src, &dst, 0);
+fprintf(stderr, "    %p cloned.\n", &src);
+
+foo = fimg_make_rndfluffy_lines(&src, &dst, 80);
+if (foo) {
+	fprintf(stderr, "err %d while making fluffy\n", foo);
+	return foo;
+	}
+
+foo = fimg_export_picture(&dst, outfile, 0);
+if (foo) {
+	fprintf(stderr, "%s: err %d exporting %s\n", __func__, foo, outfile);
+	return foo;
+	}
+fimg_destroy(&src);	fimg_destroy(&dst);
+
+return 0;
+}
 /* --------------------------------------------------------------------- */
 int essai_split_level(char *inf, char *outf, int flags)
 {
diff --git a/funcs/tests.h b/funcs/tests.h
index cfbc349..0fd7c5c 100644
--- a/funcs/tests.h
+++ b/funcs/tests.h
@@ -8,6 +8,7 @@ int essai_miroir(char *inf, char *outf, int flags);
 int essai_killrgb(char *inf, char *outf);
 int essai_decomprgb_color(char *inf, char *outf);
 int essai_decomprgb_gray(char *inf, char *outf);
+int essai_rndfluffy(char *infile, char *outfile, int k);	/* sfx3.c */
 int essai_split_level(char *inf, char *outf, int flags);
 
 int essai_displacement(char *infile, char *outfile);