You currently have three block that mimic the appearance of other blocks(All three names escape me at the moment). The problem arises when you need to "Mask" a large amount of blocks at once(If you were to, say, make a huge wall out of the unbreakable one). I request a way to mask a large number of blocks at once. Perhaps only mask one, then by right clicking it with a wand of the forest it send the masking tag to all adjacent blocks,( which in turn send it to all adjacent blocks...) forming a large chain reaction that masks everything. This of course may cause lag, so perhaps only have it effect blocks in a range around it. Any way to effect a large amount of blocks will be appreciated.