What can you get a way with? –Often times that’s the question in regards to large format graphics -with wall sizes that can be 100’+ long x 40′ tall, what’s the minimum resolution that an image needs to be in order to satisfy the human eye? Below is my take on resolution and minimum viewing distance:
15 dpi: 25 feet
25 dpi: 20 feet
50 dpi: 06 feet
75 dpi: 04 feet
100 dpi: 03 feet
300 dpi+: 1 foot