The exposition continues with unexpected forms emerging from the interferences provoked by overlaps and displacements of shapes and from the use of background forms.
'Cutting out forms in contact paper such as venillia, washes or spray in black or colours are used to give silhouettes of forms. Displacement of these shapes, overlaps, interferences, gnomon forms, background forms (using the sheet from which the object shape has been cut) all lead to the study of continuity in repetition and inversion.'

Fig.184. Overlapping forms moving randomly or in a single direction.

Fig.185. Interference of  two different forms.

Fig.186. Background forms.

Fig.187. Gnomon forms: The part of a parallelogram left when a similar one has been taken from the corner. More generally, what remains when an object eclipses something.

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