blends seem to be hot in photography right now. Im aware of someone selling tutorials and brushes/overlays but i haven't bought them (yet) cause I figure i "ought" to know how on my own (lol) but although i have tons of experience with blending modes, i still can't replicate what i've seen online... so i might just have to shell out the $$$$$! let me know if you figure it out before i part with my cash.
