diff --git a/experiment/muxplanes.c b/experiment/muxplanes.c
index f52b0d5..9367c4f 100644
--- a/experiment/muxplanes.c
+++ b/experiment/muxplanes.c
@@ -1,5 +1,5 @@
 /*
- *		another ugly experiment
+ *		another ugly experiment (please explain)
  */
 #include  <stdio.h>
 #include  <stdlib.h>
@@ -14,7 +14,7 @@ int		verbosity;
 /* --------------------------------------------------------------- */
 
 int triplane_muxer(FloatImg *sr, FloatImg *sg, FloatImg *sb,
-					FloatImg *dst, int flages)
+					FloatImg *dst, int flags)
 {
 int		foo;
 int		sz;
@@ -55,12 +55,12 @@ if (foo) {
 	}
 foo = fimg_create_from_dump(fg, &img);
 if (foo) {
-	fprintf(stderr, "%s: err %d loading %s\n", __func__, foo, fr);
+	fprintf(stderr, "%s: err %d loading %s\n", __func__, foo, fg);
 	return -1;
 	}
 foo = fimg_create_from_dump(fb, &imb);
 if (foo) {
-	fprintf(stderr, "%s: err %d loading %s\n", __func__, foo, fr);
+	fprintf(stderr, "%s: err %d loading %s\n", __func__, foo, fb);
 	return -1;
 	}