So, Halo: Reach has this cool effect for reflections on this Forerunner base: Look real close at the texture, every pattern is reflecting a cube map but in between the pattern they have hard edges for the pixels like Minecraft. It looks like this: (Zoom in) I think they achieved this effect by disabling texture filtering…
In the picture it looks like specular, but the cube map reflection is actually bent and fragmented (Like shards of a broken mirror), the specular is the same if you find the correct reflection angle which is why I think it is normals. they do a similar effect on sword base with a hexagon pattern instead of a minecraft like…