printf("or: %s <infile_height.tga> <outfile_normandheight.tga> -2 [<scale>] (read from G, Diff)\n", me);
printf("or: %s <infile_height.tga> <outfile_normandheight.tga> -3 [<scale>] (read from R, Diff)\n", me);
printf("or: %s <infile_height.tga> <outfile_normandheight.tga> -4 [<scale>] (read from A, Diff)\n", me);
printf("or: %s <infile_height.tga> <outfile_normandheight.tga> -5 [<scale>] (read from (R+G+B)/3, Diff)\n", me);
printf("or: %s <infile_height.tga> <outfile_normandheight.tga> -6 [<scale>] (read from Y, Diff)\n", me);
printf("or: %s <infile_height.tga> <outfile_normandheight.tga> -2 [<scale>] (read from G, Diff)\n", me);
printf("or: %s <infile_height.tga> <outfile_normandheight.tga> -3 [<scale>] (read from R, Diff)\n", me);
printf("or: %s <infile_height.tga> <outfile_normandheight.tga> -4 [<scale>] (read from A, Diff)\n", me);
printf("or: %s <infile_height.tga> <outfile_normandheight.tga> -5 [<scale>] (read from (R+G+B)/3, Diff)\n", me);
printf("or: %s <infile_height.tga> <outfile_normandheight.tga> -6 [<scale>] (read from Y, Diff)\n", me);