Last night's work

mods/ITEMS/vox_main/sky_island.lua

@@ -0,0 +1,10 @@
+-- ------------------------------ Sky Island ------------------------- --
+-- Cloud Block - Only pegasus can walk on it :)
+-- Players may stand on it, but sink partway through. If multiple blocks are
+-- stacked, you fall to the lowest block and still don't fall through.
+core.register_node("vox_main:cloud", {
+    description = "Cloud",
+    tiles = {"vox_cloud.png"},
+    groups = {crumbly = 1}
+})
+core.register_alias("cloud", "vox_main:cloud")