Question about Tiles, Game Specific Editors

[mdarin07]

Okay in a previous forum it has already been stated that in order to change a title, you need to have a game specific editor. To do that, you need to reverse engineer the game and then change it from there and recompile it.

However, my question is:

Can you take a sprite from one game that is extracted into a .gif image and use a tile editor or something to import it in place of another sprite in a snes game?

For example, replace the sprites of Raph in Turtles in Time with Ryu from Street Fighter?

Is this possible to do with relative ease with a tile editor? Or does it require game specific editors to be made, and lots of time to do?

Thanks,

mdarin07

[grinvader]

The first issue is graphic compression.

It is less than likely:
- for a game to have uncompressed graphical data.
- for two games to have the exact same compression algo.

So, to rip the tiles from game A you'll have to code a decompressor for algo A, and a compressor for algo B to insert the result in game B.

Second issue: animations.

Tiles are part of bigger sprites. Depending the game, animations may involve various frames, and sometimes only specific tiles are replaced in the sprite, and the rest are left untouched.
Obviously, this means the animation code in ROM only loads the right tiles when needed.
It is extremely likely:
- for two games to have sprites with different amount/placement of tiles relative to global position
- that mere tile replacing will fuck up every single sprite animation

You can now answer your own question.
Have a good day.

[mdarin07]

So it looks like it could get very screwed up trying to do that. In addition to lots of time.

I already have the .gif of ryu in every animation he does. But it would be hard to replace the ninja turtle animations with it I bet.

So I guess it is too hard to do without really taking lots of time to do it and playing around so it doesnt completley mess up everything.

Thanks for the reply.

mdarin07