Almost invisible object

Troubleshooting graphics
1

Hi!



I want to do an almost invisible object, the effect would be like the Predator movie, where the predator was invisible but you could see the contour and a slight deformation of the background through the object.



Any clues on how to do this?



Thanks

2

A GLSL shader is probably your best bet.  You might look for examples of effects such as heat displacement and bend them to your own use.