This ShowcaseView library can be used to showcase any specific part of the UI or can even be used during OnBoarding of a user to give a short intro about different widgets visible on the screen.
BubbleShowcase is a small but power flutter package that allows you to highlight specific parts of your app to explain them to the user or to showcase your app new features.
3d data visualization - this 3D photo directory was used as a showcase piece at a event in Netherlands, where this was shown on a gorgeous event screen the width of a banquet hall.