diff --git a/funcs/misc-plots.c b/funcs/misc-plots.c
index 8aa3454a..ae730e4e 100644
--- a/funcs/misc-plots.c
+++ b/funcs/misc-plots.c
@@ -32,8 +32,8 @@ for (y=1; y<fimg->height; y++) {
 		fx = (float)x / (float)fimg->width;
 		fimg_plot_rgb(fimg, x, y,
 			M*(cos(fx*K)+1.2),
-			M*(cos(fy*K)+1.2),
-			M*(cos(fx*fy)+1.2));
+			M*(sin(fy*K)+1.4),
+			M*(cos(fx*fy)+1.6));
 		}
 	}
 return 0;
diff --git a/funcs/t.c b/funcs/t.c
index d4ab3f27..019b7bb4 100644
--- a/funcs/t.c
+++ b/funcs/t.c
@@ -57,13 +57,20 @@ FloatImg	fimg;
 int		foo;
 
 fimg_create(&fimg, 512, 512, FIMG_TYPE_RGB);
+
+fimg_draw_something(&fimg);
+
+/* XXX
 for (foo=0; foo<512; foo++) {
 	fimg_plot_rgb(&fimg, foo, foo, 17000.0, 8000.0, 11111.1);
 	}
+*/
 
-fimg_save_as_pnm(&fimg, "quux.pnm", 0);
+foo = fimg_save_as_pnm(&fimg, "quux.pnm", 0);
+fprintf(stderr, "save as pnm -> %d\n", foo);
 
 foo = fimg_save_as_png(&fimg, fname, 0);
+fprintf(stderr, "save as png -> %d\n", foo);
 
 return 0;
 }