Super Mario Bros 3 Graphic Improvement V1.0
This patch is an upgrade to the "SMB3 - Graphics Update" patch by Goombill (http://www.romhacking.net/hacks/1669/)
In the download file you'll find two patch files and a PNG image file which shows the changes

Patches:

Super Mario Bros. 3 (USA) (Graphic inprovement).ips
All the graphic changes, in this one the boos turn themselves partially invisibles when you are looking at them

Super Mario Bros. 3 (USA) (Graphic inprovement)(NoInvisibleBoo).ips
All the graphic changes except the invisible boo


The image file 5.png shows on the left the unmodified sprites, and on the right the modified ones