That's interesting that Unity is being used for arch walkthroughs. I played around with it a few years back, but have not touched it since. I thought it was used primarily for gaming application, will have to look into it again. Thanks for the feedback!
Thanks Pete. Im new to Unity but find it fairly intuitive. Quite basic in terms of image control but baking in Max seems to work. I've found Flatiron invaluable for channel 2 unwrapping and light mapping. I think Unity still has a lot of unrealised potential for visualisation through it's flexibility.