Maximage Background Slider
Maximage Background Slider is a fullscreen background slideshow module for Joomla that uses jQuery Cycle plugin for it's slideshow functionality. We've tried to keep this module as simple as possible, you are not going to be overwhelmed with options like some of the slider extensions out there.
All you need to do is select your images (up to 10) and set the auto play speed. Your images will be automatically scaled to full screen, however be aware that smaller images will appear pixelated. Suggested image size is around 2560 x 1706 pixels @ 72 dpi. Try to keep each image under 300kb, otherwise it's going to take a long time to load.
There is no need to change any code on your site or in your site template, just assign this module to any module position visible on your site, for example "banner" position.