Visible Light Levels

Easily see the range of torches and other light sources from far away

Stairs, partial blocks, pistons, light source blocks, cauldrons, hoppers, and many complex blocks are all handled properly and ignored if they are not spawnable

Exceptions have been added for things like trapdoors, moss, carpets, that will not display the overlay as they are not spawnable blocks.

For those that don't know, there is an exception in Minecraft that mobs can spawn on a 1-deep layer of snow, so this pack displays the overlay on such snow blocks! Now you can spawnproof tundra as easily as desert.