diff --git a/Fonderie/fonderie.c b/Fonderie/fonderie.c
index 0d588c1..7b43136 100644
--- a/Fonderie/fonderie.c
+++ b/Fonderie/fonderie.c
@@ -186,7 +186,7 @@ puts("\t-F\toutput:filter:chain");
 // puts("\t-g\tconvert to gray");
 puts("\t-I\tinput glob pattern");
 puts("\t-L\tlist available filters");
-puts("\t-O\toutput directory");
+puts("\t-O\toutput directory (default p8/)");
 puts("\t-T\tfifo size");
 puts("\t-v\tincrease verbosity");
 
diff --git a/experiment/muxplanes.c b/experiment/muxplanes.c
index 9367c4f..d951847 100644
--- a/experiment/muxplanes.c
+++ b/experiment/muxplanes.c
@@ -14,9 +14,8 @@ int		verbosity;
 /* --------------------------------------------------------------- */
 
 int triplane_muxer(FloatImg *sr, FloatImg *sg, FloatImg *sb,
-					FloatImg *dst, int flags)
+					FloatImg *dst)
 {
-int		foo;
 int		sz;
 
 if (FIMG_TYPE_RGB != dst->type) {
@@ -48,6 +47,10 @@ FloatImg	imr, img, imb, dest;
 
 fprintf(stderr, "muxing: %s %s %s -> %s\n", fr, fg, fb, dst);
 
+if (flags) {
+	fprintf(stderr, "%s: flag non 0 ?\n", __FILE__);
+	}
+
 foo = fimg_create_from_dump(fr, &imr);
 if (foo) {
 	fprintf(stderr, "%s: err %d loading %s\n", __func__, foo, fr);
@@ -66,7 +69,7 @@ if (foo) {
 
 fimg_clone(&imr, &dest, 0);
 
-foo = triplane_muxer(&imr, &img, &imb, &dest, 0);
+foo = triplane_muxer(&imr, &img, &imb, &dest);
 if (foo) {
 	fprintf(stderr, "%s: err %d\n", __func__, foo);
 	return foo;
diff --git a/floatimg.h b/floatimg.h
index 86758e8..a4732f2 100644
--- a/floatimg.h
+++ b/floatimg.h
@@ -20,7 +20,7 @@
  *	https://git.tetalab.org/tTh/FloatImg
  */
 
-#define		FIMG_VERSION	(242)
+#define		FIMG_VERSION	(243)
 #define		RELEASE_NAME	("noname")
 #define		PATCH_LEVEL	("aaaa")