For this group exhibition (October 2008, Paris) of “artists attempting artistic production in virtual worlds” (Balzerani, 2008), Building w/immaterials constructed an immersive installation space whose objective was to call into question the partitioning of reality into virtual versus real. By establishing real-time interactivity between actual world gallery visitors and a virtual world environment, the installation attempted to replace the binary opposition real/virtual through the resonance between space/image using a Mixed Reality environment constructed for the installation space. The project’s title, LIMINAL Reality [3], expresses the a) liminal space or threshold created at the intersection of these two worlds (The Reality Festival, a temporary group exhibition in Paris, France and the sustainable virtual world of SIZIGIA Island, Second Life) and b) the transitional stage in the evolution of Mixed Reality as a tangible media.