The light blobs appear to be placed a bit off (to the left). Have you tried a smooth gradient for the light blobs already? I think it could fit nicely.

Btw. during the last semester break I worked on 2d stuff too but didn't manage to finish this concept scene:

Uni is killin' my time since then.

This is an older shot (before I've doupled the resolution) which occured after a failed shader compilation:

I kept it as reference.

Last edited by Hummel; 12/28/12 12:06.