The required cloud increase depends on cloud height and would be of the order of 1 % global coverage for low clouds (i.e., 2 to 5 % over land). (ipcc.ch)
The warming effect of clouds depends on cloud height and effective cloud amount, but also on atmospheric conditions like near - surface temperature and humidity. (pubs.giss.nasa.gov)
Besides showing pretty views, EPIC provides scientists with metrics on climate such as cloud height, ultraviolet reflectivity, or ozone and aerosol levels. (space.com)