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Anmflare Texture
Type:  Color, Filter.

This texture creates a lensflare out of, well, any object.
I mostly use a cube for this one. The idea is that the y axis of the
texture is the direction of the light, so when the y axis is pointing
straight into the camera, the flare is the most intense.
You could, for instance, make a spotlight, add a BRIGHT cube at the
position of the lightsource (with the y axis pointing in the same
direction as the lightsource) add this texture and voila, you have a
real working lensflare.
Of course you don't have to add it to a lightsource, just add it
anywhere, also it doesn't have to respond to the camera, just
experiment.

Requester:

Radius:                         Radius of the lensflare when y axis is
                                aimed at the camera.
Intensity (0..1):               Intensity of flare when aimed at the
                                camera.
Edge Red, Green, Blue:          Color at edge of flare.
Radial fade (0..1):             Radially attenuates the flare to make it
                                less hard.
Max. Angle (0..180):            Angle with camera at wich the flare takes
                                on the second set of parameters,
                                or zero for no response to camera.
3D Flare (0,1):                 Make 2D (0, for a plane) or 3D (1, for a
                                cube) flare.
Radius2:                        Flare radius at Max. Angle or higher.
Intensity2 (0..1):              Flare intensity at Max. Angle or
                                higher.

sample object: any object 
              (try a cube, make sure y-axis points to front in detail).