Does not work if compressed or altered but alteration is rare and compression. Grab data from VRAM (or whatever it is called on your system of choice - the megadrive has some alternative names for some things) and search the ROM for that.
I) Get to point in the game where the graphics are displayed. Open ROM, set likely settings (custom tiles are kind of thing a here but 8x8 is a good start, SMD or GEN will likely be the abbreviation), press down/page down a lot and scroll through the ROM until you find something interesting.Ģ) A bit more targetted. I like tiled2002, tileggd and crystaltile2 myself but most things should do the megadrive/genesis graphics formats (the ones there I have as they do GBA formats many others do not do). To that end you are left with two main approachesġ) Get a tile editor.
Palettes are not always necessary to edit (if you know something is one colour then pick it from elsewhere in the image and use that) but it does help, you can snatch them from memory too and if not there are usually not very far from graphics. Hopefully you are also aware of palettes as it pertains to this sort of thing - most console graphics are not bitmaps that include what colour each pixel is but instead a very boring exercise in paint by numbers with the key being the palette (which you can change to change colours, hence palette swap enemies and ). Cartridge based consoles prior to the DS usually operated on an all in one principle, or incbin if your prefer C like terminology.
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