Interactive Ray Tracing for Virtual TV Studio Applications

In the last years, the well known ray tracing algorithm gained new popularity with the introduction of interactive ray tracing methods. The high modularity and the ability to produce highly realistic images make ray tracing an attractive alternative to raster graphics hardware. Interactive ray tracing also proved its potential in the field of Mixed Reality rendering and provides novel methods for seamless integration of real and virtual content. Actor insertion methods, a subdomain of Mixed Reality and closely related to virtual television studio techniques, can use ray tracing for achieving high output quality in conjunction with appropriate visual cues like shadows and reflections at interactive frame rates. In this paper, we show how interactive ray tracing techniques can provide new ways of implementing virtual studio applications.

The Deprofessionalisation Thesis, Accountability and Professional Character

It is said that the deprofessionalisation of social work and other welfare occupations reduces workers' professional discretion and autonomy, and thus their capacity to act in the best interests of their client. Without necessarily regarding the deprofessionalisation thesis as conclusive, this paper will ask how the state's control of the role and task of social workers impacts on their role-implicated obligations as professionals. If workers are reduced (as claimed) to the status of mere functionaries in systems they neither approve of nor control, does this exonerate them from bad outcomes or service failures? How should we view the dramatic increase in formal regulation now seen in the UK - as professionalisation or deprofessionalisation? The paper will argue that whatever the drift of policy, workers remain in some measure personally accountable. Service failures imply faults of practical reason that are partly attributable to the moral and intellectual character of professionals as individuals. It is therefore up to professionals, and their organisations, to attend to the improvement of professional character.

GPU-based Ray Tracing of Dynamic Scenes

Interactive ray tracing of non-trivial scenes is just becoming feasible on single graphics processing units (GPU). Recent work in this area focuses on building effective acceleration structures, which work well under the constraints of current GPUs. Most approaches are targeted at static scenes and only allow navigation in the virtual scene. So far support for dynamic scenes has not been considered for GPU implementations. We have developed a GPU-based ray tracing system for dynamic scenes consisting of a set of individual objects. Each object may independently move around, but its geometry and topology are static.