Originally Posted by
Andraax
When you drop it into GIMP, it uses the original size. I forgot exactly what scale he uses for his tiles, but if it's say 50x50, then figure out how big you want your map in tiles wide and tiles high, multiply both of these by 50, then create a new image using those dimension. Create a grid that is 50 high and 50 wide. Turn on "snap to grid". Then just drag tiles from a file explorer window onto GIMP, and move them into place on the grid. With "snap to grid" turned on, the tiles should line up with very little effort on your part - just drag them into pretty close and it will "snap" into place when you drop the tile.