Thanks for your comment. Further effects programming is intended, but not yet (this will be adressed later with some other scheduled things) - I just wanted to have the basic behaviour in my framework.

The Serious Sam lensflare is exactly the way I did'nt wanted it to be: way too blurry (and did you noticed that the flare is beneath the gun model? ). Well, maybe I'll add some blur to some sprites.. but thats all. What did you meant with "sprites in sprites"? I dont get it.

And yes, the sun sprite is included in the image (the skybox contains a pre-baked sun as well, but it doesnt include anamorphic lightning which can only be achieved by non-rotating sprites.

BTW: I tried it with an uniform scale of 2 on all sprites, looks a bit better.. well.