Different quality in different computers

Hi,
I have a game that in my computer it looks nice ( shadows and anti-alising), but when i switch a computer the quality is worse(without shadows and anti-alising) any ideas?

Most probably its because of the hardware i.e graphic card. Other machine might need a better graphic card, it might not support many of the rendering features.

Ok found the problem. when uploaded the project to different computer the qulity settings went down, with manualy increasing the settings(or just dont allow lower quality when building) it solved the problem.