Currently have our company logo appear which links to our website when clicked. How can I add a second logo (e.g. for a client) to the walkthrough? I would like both appearing at the same time. Thanks!
Shapespark editor built-in customization functions do not allow for this. You could combine two logos into one image, but then only one click destination will be used for this combined image (or you could not specify logo URL in which case clicking the logos will do nothing). Anything more advanced would require you to write your own HTML based customization.
You could also consider placing the logos in 3D, for example the opening view could have your or your customer logo on some texture. Then you could use HTML Label or Open URL extensions to handle clicks in such logo.