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Was sitting all day today making beams and "lasers". But problems started appearing as my emission-textures stopped working after changing in my spline-deformers. So i tried some stuff and it came on and off. Here is a link to what i mean, as long as the deformer has no keyframes it works fine but when i start animating it some stuff just stops working, anyone had this problem and knows how o resolve it? Please I've been trying for hours now... (c4d file here http://d.pr/f/19j60)

The problem is not the deformer. The texture emission works only on the front face of a polygon and not on the back face.
In the spline deformer, if you put the starting point to 46% and end point to 0%, you will get a geometry with the flipped normals and that is the reason the emission isn't visible.
Put the starting point to 0% and end to 46% (reverse) and the normals will be pointing outwards and the emission will work as expected.

A note for emissive geometry. Best is to put also a object tag over this kind of geometry. This avoids from normalisation problems of illuminations and also matches well with render output. Also see FAQ topic.

Thank you guys! Never expected it to bee this easy!