Shadow Casting (CineRender)

Use the Area Shadow Quality controls to define Shadow quality:
By Light Settings means that the Shadow Casting setting for each individual placed light object (as defined on the Lamp Settings Light Parameters page) will be in effect in this Scene. (See also Shadow Casting.)
Note: The following three parameters are relevant only if you are using the Standard renderer. They have no effect in Physical rendering mode!
Minimum Samples and Maximum Samples let you set many or few samples, as needed (as well as an interpolation between them).
The Accuracy setting determines how (and how many) samples will be allotted in order to achieve the best result. In the most critical areas, Maximum Samples may be set to its highest value.