return block.getMaterial().isOpaque() && block.isFullCube() ?
	true :
	(block instanceof BlockStairs ?
		iblockstate.getValue(BlockStairs.HALF) == BlockStairs.EnumHalf.TOP :
		(block instanceof BlockSlab ?
			iblockstate.getValue(BlockSlab.field_176554_a) == BlockSlab.EnumBlockHalf.TOP :
			(block instanceof BlockHopper ?
				true :
				(block instanceof BlockSnow ?
					((Integer)iblockstate.getValue(BlockSnow.field_176315_a)).intValue() == 7 :
					false))));