Gameboy Development Forum

Hi,

I´m kinda depressed (and annoyed), because every piece of information I found  wasn´t  very helpful.

My question: How can I change background tiles (with the ZGB Engine) of a level permanently? I looked at several examples / tutorials and the GBDK documentation, but nothing worked quite right.

I know there is the ReplaceTile function, but the function is setup to work with sprites. How can I use it for swapping tiles of the same background tileset?

My idea: I have a tileset, which has items as tiles. When the player sprite stands over such a tile and a button is pressed, the tile switches to another tile of the same tileset (an empty one) as if the item was picked up. I want to try this idea, because the sprite limit is giving me headaches. Ton of games use this trick (Tetris, Chessmaster, Castle Quest), but I am not skilled enough (learning C at the same time) to get it working myself. The important part is swapping the tiles. I got tile checking already working (for example: stairs).  So I hope to find some advice here. Thank you very much!