Interactive Materials, Any tutotial?...

Hi boys, I´m very happy with my Architecturals renders results, nice render engine boys… I have 1 question, Is there any tutorial about how to get Interactive materials?.. I only want my clients could change any materials for anothers in their finished model…

Thanks in Advance Boys…

Something like this:

In minute 1:20

Just some thoughts:
You would need to work with UMG widgets and wrap the meshes in a blueprint.
Then change the materials via interaction with the widgets.

Ok, thanks so much, I will try to do it, or finding something in google… really thanks…