hm,it seemed easy until the troubles started. I would like to make an effect similar to the flare at the end of 3dmark2000 demo,or for sci-fi fans sth like photon torpedo.I tried with halo,lines blabla but i cant make it change its shape,I tried rotating object,rotating camera but the problem still persists 
.Some help?
I don’t know how to do it in blender, but most post-processing software can add lense flares.
Another solution would be to do it by hand using planes and textures. It’s really only about ten or so for a good lense flare. And I believe you can change the size of a halo’d object over time.
Anyways, a bit of texture cheating using a combination of GIMP/Photoshop and some planes should do the trick, unless someone else here knows how to get proper flares in Blender (if so, please tell, as I’d love to know too 
).