diff --git a/Fonderie/crapulator.c b/Fonderie/crapulator.c
index 110ff95..c59519e 100644
--- a/Fonderie/crapulator.c
+++ b/Fonderie/crapulator.c
@@ -152,6 +152,25 @@ fimg_destroy(&img);
 return retval;
 }
 /* -------------------------------------------------------------- */
+int run_killrgb_0(FloatImg *img, int k)
+{
+FloatImg		tmp;
+int			ret;
+
+// fprintf(stderr, "----> %s\n", __func__);
+
+memset(&tmp, 0, sizeof(FloatImg));
+
+fimg_clone(img, &tmp, 0);
+ret = fimg_killrgb_v(img, &tmp, k);
+fimg_copy_data(&tmp, img);
+fimg_destroy(&tmp);
+
+// fprintf(stderr, "%s ---->\n", __func__);
+
+return ret;
+}
+/* -------------------------------------------------------------- */
 /*
  *	This is the main filter engine used both for input and
  *	output processing. It can be called by the filterstack
@@ -319,6 +338,10 @@ switch (idFx) {
 		retval = do_something(image, 3);
 		break;
 
+	case CR_killrgb0:
+		retval = run_killrgb_0(image, 0);
+		break;
+
 	case CR_hilightr:
 		retval = fimg_highlight_color(image, image, 'R', 1.717);
 		break;
@@ -358,7 +381,7 @@ void list_crapulors(char *texte)
 int		idx;
 
 #define OUT	stdout
-fprintf(OUT, "______________. %s\n", texte);
+if (NULL!=texte) fprintf(OUT, "______________. %s\n", texte);
 for (idx=0; CrapL[idx].id!=-1; idx++) {
 	fprintf(OUT, " %-12s | %4d  |  %5d  |  %8.3f\n",
 					CrapL[idx].name,
diff --git a/Fonderie/crapulors.liste b/Fonderie/crapulors.liste
index a66d743..28ae509 100644
--- a/Fonderie/crapulors.liste
+++ b/Fonderie/crapulors.liste
@@ -33,6 +33,7 @@
 32	vsglitch	1	1.0
 33	crumphard	1	1.0
 42	nothing		42	3.1415926
+43	killrgb0	1	9
 45	hilightr	1	1.717
 99	message		1	1.0
 -1	end		1	1.0
diff --git a/floatimg.h b/floatimg.h
index b863536..2521ec2 100644
--- a/floatimg.h
+++ b/floatimg.h
@@ -4,7 +4,7 @@
  *	http://la.buvette.org/photos/cumul
  */
 
-#define		FIMG_VERSION	154
+#define		FIMG_VERSION	155
 
 /*
  *	in memory descriptor
diff --git a/funcs/Makefile b/funcs/Makefile
index 09e44b9..2252814 100644
--- a/funcs/Makefile
+++ b/funcs/Makefile
@@ -37,6 +37,9 @@ tests.o:	tests.c tests.h $(DEPS)
 
 # ###
 
+killrgb.o:		killrgb.c  $(DEPS)
+	gcc $(COPT) -c $<
+
 recurse.o:		recurse.c  $(DEPS)
 	gcc $(COPT) -c $<
 
diff --git a/funcs/killrgb.c b/funcs/killrgb.c
index 2c8e1bf..f61c285 100644
--- a/funcs/killrgb.c
+++ b/funcs/killrgb.c
@@ -17,17 +17,20 @@
 int fimg_killrgb_v(FloatImg *src, FloatImg *dst, int k)
 {
 int		foo, line, col;
-int		ir, ig, ib;
+int		ir;
 
+#if DEBUG_LEVEL
 fprintf(stderr, ">>> %s ( %p  %p  %d )\n", __func__,
-				src, dst, k);
+			  src, dst, k);
+#endif
 
 fimg_clear(dst);
 
-ir = ig = ib = 0;
+ir = 0;
 
 for (line=0; line<src->height; line++) {
-	for (col=0; col<src->width; col+=3) {
+	// fprintf(stderr, "%s line %d\n", __func__, line);
+	for (col=0; col<(src->width-3); col+=3) {
 
 		dst->R[ir  ] = src->R[ir];	ir++; 
 		dst->G[ir+1] = src->G[ir];	ir++;