In the technological model, Deleuze discusses fabric, felt and quilts, using quilts or patchwork as an example of a mathematical model: "An amorphous collection of juxtaposed pieces that can be joined together in an infinite number of ways." (P. 476)

Deleuze argues that the patchwork is literally a Riemannian space, which is essentially a space made up of small domains. Explaining further, thanks to wikipedia: a Riemannian geometry is the branch of differential geometry that studies Riemannian manifolds, smooth manifolds with a Riemannian metric, i.e. with an inner product on the tangent space at each point which varies smoothly from point to point. This gives in particular local notions of angle, length of curves, surface area, and volume. From those some other global quantities can be derived by integrating local contributions.

Deleuze then uses the the smooth space of patchwork to demonstrate that the smooth does not mean that it is homogenous but rather "an amorphous, non-formal space prefiguring op(tical) art"