The light-exclusion covering is composed of two planar structures (1) located one behind the other, each of which consists of side by side webs (B) with regions (2; 3) of differing light transmissivity, that are connected to each other by connecting pieces (Z) with similarly selectable light transmissivity. The planar structures (1) consist preferably of a woven textile fabric produced on a knitting machine with programmed data for sizing and for the light transmissivity of the individual regions. (FIGS. 1 and 2)