I am new to Unity and I am developing a game using unity its a 2d game i am using tk2d framework. I have a big background image(4096*4096) how can I load this background so only visible part of the background has to be rendered so it wont effect the performance. How can I achive this in unity & tk2d?
You're going to have to break up the image into multiple sections. Probably 1024x1024 for maximum compatibility (source). Then you can just place them in the background in order.