Almost every type designer feels the need, from time to time, to interrupt his or her serious work on complex text type systems for something more playful. In Luc(as)'s case this has often meant designing more typefaces. In the early 1990s, while working on Thesis, Luc(as) drew several display faces which were based on the shapes of TheSans but were either de(con)structive versions or experimental variations.

Probably the most innovative of these was Nebulae, in which the lettershapes have been dissolved into clouds of bubbles; the three versions can be layered to obtain a denser (and more legible) structure which can also be multi-coloured. A fourth version called ThreeDee (3D) offers a convincing simulation of three-dimensional bubble-like type floating in space.