Demonstrating green-screen application. A quite old technique, yet remains a staple in the film industry for small and large-scale special effects, and which can transform static single presentations to be valid across different audiences – all accomplished during post production rather than re-filming. Examples from serious to fun.
And a study in alternative screens shows how a white screen, or even a white rough wall, can also be utilised. Part of the secret is in the lighting, but that does not need to be difficult either.