As in like, one effect for all layers. Scanlines specifically. I tought that applying the effect on a layer with 0,0 parallaxing (the topmost hud layer) would work, but it only works on that layers sprites.
The workaround i've found was to put a huge tiledbackground over the entire layout and giving it the scanline effect with additive blending. Kinda works, but i think there is a better way to do that?
Also, it looks kinda weird when the game is downscaled, at 1-3x, it seems the scanlines aren't scaled properly, or glue together, i don't know, it's not as awesome as in 4x
Thanks in advance!