I have a character with a hologram effect by using the Layer Weight node.
The file won't upload so here's an image:
So when the Layer Weight node is connected in the Factor of the Mix Shader, the two inputs of the Mix shader are blended in a way that whatever is in the first input, it will be shown on the normals of the character that are more facing the camera (Emission and Transparent shader, in my example). I’m using a similar material with a gradient texture, its just that the polygons (with the "Lines" Attribute) that are more facing the camera are mixed with transparency and the other once with Emission. The normal map of the character is using a different UV layout/Attribute (this is more clear in the node setup of the file). But, is there a way for the lines to face the Global Z direction all the time even when I animate the character? Because the lines are likely to be animated to travel at the Z axis.
The texture for the lines - http://fc04.deviantart.net/fs71/i/2012/225/8/5/gradient_stock_01_by_gradient_textures-d5ayk4y.jpg