Media Servers have certainly advanced in the two years since our last Buyers Guide (PLSN, June 2018, page 60). Many now incorporate extra effects for manipulating live camera inputs, such as Notch and Video Dust. Many companies also now offer software, and whatever hardware one chooses to install it on dictates your limitations. Advances include 3D import mapping and real-time UV mapping, and edge-blending is now the norm.
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