A new tutorial that helps create an appearance effect (using spawners) is available on the learning wiki here:
http://orx-project.org/wiki/tutorials/spawners/futurama_appearance
At the start of every episode of Futurama, a blue appearance effect is seen. This is a little inspired by that, and makes a great way to dramatically create an object onscreen.
Comments
Shouldn't it appear in this section as well: http://orx-project.org/wiki/examples/spawners/main ?