A simple utility for extracting Zone layout maps from Gens savestates of Sonic 3 and Sonic & Knuckles in BMP or PNG format.
Foregrounds, backgrounds, objects, and palettes are all supported in the latest version.
You can find a 7z archive of useful savestates on the Resources page.

Version	Size	Download
1.1a	2.2mb	download
1.1	3.3mb	download
1.0	3.3mb	download

Version 1.1a

            Added the ability to view and export Plane B (background) layouts.
            Fixed a bug when exporting maps while Zoomed in.

Version 1.1

            Added the ability to use the underwater palettes.