White Night, you say? Hot damn. Well, I think I may have accidentally discovered the inspiration for that title.

And on a sidenote,
shit, they took my matchbook idea I was gonna suggest in the suggestions/brainstorming thread.
In Neverending Nightmares all of the shading was done with horizontal lines. I'm going to assume that you did multiple tests with perpendicular diagonal lines and vertical lines and settled on horizontal cause it looked the best, so I won't suggest anything further with cross-hatching. However, have you considered using stippling instead? An example:
Cross-hatching:
Stippling:
(sources:
http://allikatt.deviantart.com/art/Cros ... e-10362930
http://allikatt.deviantart.com/art/Stip ... e-10362975 )
I think if done right, the dots could provide a kind of revolting, splattery, pock-markey kind of effect. Maybe you could go for a sort of "ants-are-crawling-all-over-your-monitor" look, where each individual stipple shifts and moves around, or a sort of "those-eye-floater-things-you-see-sometimes" look where they kind of sliiiide up and down in big patches. Or, since they're little dots, I suppose you could really go nuts with it and make it look like dust in the wind or sand billowing in an underwater current, where it kind of ebbs and flows and dances around the light. However, I've seen your Retro/Grade postmortem, and I know that the phrases "particle system" and "go nuts" kind of have a bad history with you, so perhaps it's best to just keep it simple.
Anyways, just something to think upon.