This mod changes many full nodes, slabs, and stairs to have studs on top to look like interlocking bricks. I have tested it with Minetest Game and Mineclonia, so it should work with MineClone2 or MineClone5.

Many naturally generated nodes do not have studs, to avoid a Minetest rendering performance problem. You can read more about that here: https://forum.minetest.net/viewtopic.php?f=7&t=28068&p=409857