If it is a 3x3 design with each pixel being (approximately) 9 game pixels, to make a LED resolution of 800x600 i will need
480,000 pixels
480,000 times 9 (9 game pixels per led pixel) = 4.32 million game pixels.
To get 4.32 million game pixels i will need a game resolution of 7200 by 5400 which equals 38.88 million game pixels (major miscalculation)