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    Interactive Relighting for Stage Use
    (The Eurographics Association, 2009) Stephenson, Ian; Wen Tang and John Collomosse
    Re-lighting by combining images taken under known lighting conditions to synthesise new lighting configurations is a simple, but powerful technique capable of producing impressive results. However it has found little practical application. Here we demonstrate the integration of a relighting tool into a typical theatrical lighting system, to provide real time previews both offline when the stage is unavailable, and during performance.
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    Screen Space Re-Rendering for the Simulation of Concert Lighting
    (The Eurographics Association, 2010) Stephenson, Ian; Scanlan, Liam; John Collomosse and Ian Grimstead
    The visualisation of modern concert lighting requires complex illumination models to be calculated at interactive frame rates. Each light may have 20 or more parameters which are all changing in real time. Here we present a technique which allows static scenes with rapidly changing illumination to be re-rendered quickly in graphics hardware, with support for arbitrary geometry, complex BRDFs, shadowing and volumetric fogging. The rendering algorithm is re-factored to allow changing lighting to be applied to scenes which are otherwise fully rendered, minimising the calculation required when lights are moved.
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    Computer Modelling of Theatrical Sets
    (The Eurographics Association, 2010) Stephenson, Ian; Pride, Rebecca; John Collomosse and Ian Grimstead
    Here we discuss the design and implementation of a modelling tool specifically targeted for use by designers of theatrical sets. By applying domain specific knowledge and contraints to the design of the software, we demonstrate a system which can be used without signifigant training, by users with no previous computer graphics experience. We present initial end user experiences of using the tool in designing a real production of The First Arabian Night .