Soft re-use of brownfields describes intended temporary or final re-uses of brownfield sites which are not based on built constructions or infrastructure (‘hard' re-use). Examples of soft re-uses include the creation of public green space. These are essentially uses where the soil is not sealed. Often the case for soft re-use of brownfields has not been easy to demonstrate in strictly financial terms. The purpose of this paper is to describe a value based approach to identify and optimise services provided by the restoration of brownfields to soft re-uses, on a permanent or interim basis. A ‘Brownfield Opportunity Matrix' is suggested as means of identifying and discussing soft restoration opportunities. The use of ‘sustainability linkages' is suggested as a means of understanding the sustainability of the services under consideration and providing a structure for the overall valuation of restoration work, for example as part of design or option appraisal processes, or to support the solicitation of interest in a project

It is commonly acknowledged that the the instantaneous shutter model used in primitive rendering systems produces images which are unrealistic, and animate poorly. However the introduction of motion blur as implemented in most modern renderers uses a shutter model which is equally implausible. One of the few articles to examine this effect is [Glassner 1999], which considers the behavior of focal plane shutters. While the results obtained from the simulation of focal plane shutters are dramatic, more subtle and useful images can be obtained by considering the case of a leaf shutter, which is embedded within the lens elements.

A development environment for RenderMan shaders has been implemented, allowing the SL programmer to observe the bahaviour of variables in both time and space. By allowing both novices and experts to visualise the execution of their code, the creation of shaders is much simplified without restricting the flexability of the SL language.

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