A feature of Corvus is the expanded module. Any module that has the expanded module class suffix applied to it, will expand and contract based on window scroll. The feature is best applied in the showcase position, with a full width module, as demoed currently. The overlap effect below, is via CSS and can be customized through the custom stylesheet process, depending on your content needs.
RocketLauncher installs a replica of the demo.
Replicate the demo with the RocketLauncher package
The RocketLauncher package installs a full version of Joomla with the demo sample data and sample images included.