Mixed Reality Ltd is the trading name of Dr Eric Tatham, who is an independent Virtual Reality Designer, iOS App Developer and Educator.
Eric has retired recently from a long career as a University Lecturer. He is author of two books on Computer Programming and has for many years been an active researcher in the field of Computer Graphics and Augmented Reality.
He has taught full-time at The Open University, Coventry University, Bradford University and De Montfort University. He was formerly Head of Technology and specialised latterly in teaching 3D Graphics, Animation and Computer Games Programming.
He has a first class degree in Electronics and Computer Science (Open), a MSc in Computer Science (Herts) and a PhD in Augmented Reality Technology (Loughborough).
He has a particular interest in human-computer interaction in art, museum and heritage applications and has completed a variety of such projects.
He is also a keen amateur photographer and committee member of the Dunchurch Photographic Society.
He is always on the lookout for interesting new projects and would love to hear your ideas.
Mixed Reality, UK 
Hi Eric, thank you, your post on tiled overlays helped me quite a bit.