This is what a iso tile should look like isn''t it? 000011110000 001100001100 110000000011 110000000011 001100001100 000011110000 but how to put them together? I have such a routine: DrawX = IndexX * TILE_WIDTH + (IndexY & 1) * TILE_WIDTH / 2; DrawY = IndexY * (TILE_HEIGHT / 2 + 1); This is how I learned it and how you can put them next to each other without overlapping lines. But I have a problem with this, because with this way you can''t make textured tiles connect correctly because they shift in the Y direction. The middles of the tile sides don''t connect correctly. So instead of two straight diagonal lines in the map you get a stepped look. I hope I explained it good enough, if I don''t just tell me and I''ll try again... (and I''ll add some more later, because I found a solution, but that gives me some more problems...) Mox

I''ve tried a lot of diffirent tiles now and I think I finally have a good one. I use the algorith I posted before and think the tiles connect perfectly now...

0000001100000000
0000111111000000
0011111111110000
1111111111111100
1111111111111100
0011111111110000
0000111111000000
0000001100000000

This way the textures on the tiles also connect correctly

Mox

If tiles are of the size N by N/2-1 then you can use:

Xdraw = (Xindex-Yindex)*TileWidth
Ydraw = (Xindex+Yindex)*TileWidth/2