Found some brilliant tools for simulating lens flares in AfterEffects, works surprisingly well, It's not physically accurate or anything like Maxwell render but It's can recreate a lot of the cool effects with added bonus of tons and tons of manual control.

It's called Optical Flares and is quite quite good

:-)

Link: www.videocopilot.net --- opticalflares

Sadly again this helps me little (not at all) in making actual textures or art for lumen, but is cool still.