Interwall is an application program which supports the media art activity "Renga" implemented on distributed object middleware, ANCL (Ad hoc Network Computing Library).

"Renga" is inspired by Japanese traditional "linked poem". Server/client system "The Wall" (1998) had enabled to create a "linked image" on virtual cylinder "Wall" which shaped on the Internet under the collaboration of creators scattered over the Internet.

"The wall" had been tested also in the classroom of elementary school in 1998 and it had been shown that this system also stimulate creativity of children.

On the other hand, wireless network becomes to a network solution which gives high performance and enormous flexibility with low cost. Wireless network allows people to move around with notebook PC. "Interwall", re-implemented version of "The Wall" on the top of ANCL, seized this flexibility and mobility. When peple are in range each other, Interwall builds up their shared "Wall" spontaneously for collaboration.

PC which running ANCL, called "node", automatically detects other nodes, establish connection, and shape cluster of nodes. Virtual object space is formed and shared between the nodes belong to the cluster. Each nodes can put and get JAVA(TM) object to/from this virtual object space. Furthermore, ANCL furnishes automatic data replication mechanism, messaging facility and mutual exclusion facility to application programmers and high portability achieved by using JAVA(TM).

With ANCL, Interwall had became real-time, server-less and easy-to-use graphic centric collaboration environment, which has rich and unique drawing facilities to interaction.