Looks to me like your game is "Z" fighting with Minecraft's wonky lighting engine.
A not so common problem while running Java 7. If it bothers you that much you should place down some light sources around, if the lighting bugs don't drive you crazy,then surly the creeper's and bat's will...
Yes that's exactly it! It's mostly chests and liquid containers, although a few other blocks do it too. I'm using a Radeon 7950, which should be more than enough for Minecraft. Hopefully a driver fixes it at some point.
Well, ive had the derpy lighting bug. and it seems entirely related to "some mod" with a transparent (self rendered block) not restoring openGL state properly when its done rendering its stuff, resulting in a cascade of shading problems for stuff subsequently rendered. As the render order changes (as you move the viewport around) this alters the point at which the derpy renderer stuffs with the openGL state, and changes - randomly - the subsequent shading.
Tracking down the mod responsible is no small task as, if you really wanted to pin it down, you would need to exhaustively add / remove one mod at a time, restoring the world each time as the block removal caused by removing a mod, will doubtless perturb the world enough that replicating the shading issue will change anyway. And I found the problem would only manifest after a while.
Unless of course, someone with sufficient expertise (I certainly don't) writes an OpenGL call validation mod that can track OpenGL state before and after each mod does its draw calls, to validate it hasn't been altered in a bad way.
May sound weird, but have you tried turning off smooth lighting? It can actually cause lighting issues, for example, the black unlit textures you can get with microblocks sometimes. Give it a whirl, smooth lighting blows ass anyway.
Yes I do and it could have something to do with that but I can't say for sure. I'm using the updated version, 0.6, since the DW20 pack only has 0.40 and that was causing crashes when Iron Spikes killed mobs.
Last night I added Barrels mod to my Monster derivative.
As I logged in my lighting was glitched. without even making a barrel.
I logged out, removed the barrels mod, and logged in. Lighting was normal.
My buildcraft room *suddenly* had a bunch of items that were either full-bright, or deep in shadow if I looked *At* them.
Near the edges of the screen, items would suddenly revert to being properly lit.
The effect is somewhat random - some of the items are properly lit even when looked at which makes the exceptions even more glaring.