Grid computing is finally starting to provide solutions for capacity-computing, that is problem solving where there is a large number of independent tasks for execution. This paper describes the experiences with using Grid for capability computing, i.e. solving a single task efficiently. The chosen capability application is driving a very large display which requires enormous processing power due to its huge graphic resolution (7168 x 3072 pixels). Though we use an advanced Grid middleware, the conclusion is that new features are required to provide such coordinated calculations as the present application requires.