diff --git a/mods/rp_partialblocks/api.lua b/mods/rp_partialblocks/api.lua
new file mode 100644
index 0000000..ee17fe3
--- /dev/null
+++ b/mods/rp_partialblocks/api.lua
@@ -0,0 +1,205 @@
+
+--
+-- Partial blocks API
+--
+
+local adv_slab_tex = function(name, tex_prefix)
+	local t1 = minetest.registered_nodes[name].tiles[1]
+	local t2 = tex_prefix.."_slab.png"
+	return { t1, t1, t2 }
+end
+local adv_stair_tex = function(name, tex_prefix)
+	local t1 = minetest.registered_nodes[name].tiles[1]
+	local t2 = tex_prefix.."_stair.png"
+	local t3 = tex_prefix.."_slab.png"
+	return { t3, t1, t2.."^[transformFX", t2, t1, t3 }
+end
+
+function partialblocks.register_material(name, desc_slab, desc_stair, node, groups, is_fuel, tiles_slab, tiles_stair)
+   local nodedef = minetest.registered_nodes[node]
+
+   if nodedef == nil then
+      minetest.log("warning", "[rp_partialblocks] Cannot find node for partialblock: " .. node)
+
+      return
+   end
+
+   -- Slab
+   local tiles
+   if tiles_slab then
+      -- Advanced slab tiles
+      if type(tiles_slab) == "string" and string.sub(tiles_slab, 1, 2) == "a|" then
+          local texpref = string.sub(tiles_slab, 3)
+	  tiles = adv_slab_tex(node, texpref)
+      else
+      -- Explicit slab tiles
+          tiles = tiles_slab
+      end
+   else
+      -- Slab tiles from base node
+      tiles = nodedef.tiles
+   end
+   local groups_slab
+   if not groups then
+      groups_slab = table.copy(nodedef.groups)
+   else
+      groups_slab = table.copy(groups)
+   end
+   groups_slab.slab = 1
+
+   minetest.register_node(
+      "rp_partialblocks:slab_" .. name,
+      {
+	 tiles = tiles,
+	 groups = groups_slab,
+	 sounds = nodedef.sounds,
+
+	 description = desc_slab,
+	 drawtype = "nodebox",
+
+	 node_box = {
+	    type = "fixed",
+	    fixed = {-0.5, -0.5, -0.5, 0.5, 0, 0.5},
+	 },
+
+	 paramtype = "light",
+	 is_ground_content = nodedef.is_ground_content,
+
+         on_place = function(itemstack, placer, pointed_thing)
+            -- Slab on slab placement creates full block
+            if not (pointed_thing.above.y > pointed_thing.under.y) then
+               itemstack = minetest.item_place(itemstack, placer, pointed_thing)
+               return itemstack
+            end
+            local pos = pointed_thing.under
+            local shift = false
+            if placer:is_player() then
+               -- Place node normally when sneak is pressed
+               shift = placer:get_player_control().sneak
+            end
+            if (not shift) and minetest.get_node(pos).name == itemstack:get_name()
+            and itemstack:get_count() >= 1 then
+               minetest.set_node(pos, {name = node})
+
+	       if not minetest.is_creative_enabled(placer:get_player_name()) then
+                   itemstack:take_item()
+               end
+
+            else
+               itemstack = minetest.item_place(itemstack, placer, pointed_thing)
+            end
+            return itemstack
+         end,
+   })
+
+   crafting.register_craft( -- Craft to slab
+      {
+	 output = "rp_partialblocks:slab_" .. name .. " 2",
+	 items = {
+	    node,
+	 },
+   })
+
+   local full_node_burntime
+   local output = minetest.get_craft_result({
+      method = "fuel",
+      width = 1,
+      items = {node},
+   })
+   full_node_burntime = output.time
+
+   if is_fuel then
+      local burntime
+      if full_node_burntime > 0 then
+	      -- Burntime is 50% of the origin node (if a fuel recipe was available)
+	      burntime = math.max(1, math.floor(output.time * 0.5))
+      else
+	      -- Fallback burntime
+	      burntime = 7
+      end
+      minetest.register_craft( -- Fuel
+	 {
+	    type = "fuel",
+	    recipe = "rp_partialblocks:slab_" .. name,
+	    burntime = burntime,
+      })
+   end
+
+   -- Stair
+
+   local tiles
+   if tiles_stair then
+      if type(tiles_stair) == "string" and string.sub(tiles_stair, 1, 2) == "a|" then
+      -- Advanced stair tiles
+          local texpref = string.sub(tiles_stair, 3)
+	  tiles = adv_stair_tex(node, texpref)
+      elseif tiles_stair == "w" then
+      -- World-aligned stair textures
+          local texname = minetest.registered_nodes[node].tiles[1]
+          tiles = {{ name = texname, align_style = "world" }}
+      else
+      -- Explicit stair tiles
+          tiles = tiles_stair
+      end
+   else
+      -- Stair tiles from base node
+      tiles = nodedef.tiles
+   end
+
+   local groups_stair
+   if not groups then
+      groups_stair = table.copy(nodedef.groups)
+   else
+      groups_stair = table.copy(groups)
+   end
+   groups_stair.stair = 1
+
+   minetest.register_node(
+      "rp_partialblocks:stair_" .. name,
+      {
+	 tiles = tiles,
+	 groups = groups_stair,
+	 sounds = nodedef.sounds,
+
+	 description = desc_stair,
+	 drawtype = "nodebox",
+
+	 node_box = {
+	    type = "fixed",
+	    fixed = {
+	       {-0.5, -0.5, -0.5, 0.5, 0, 0.5},
+	       {-0.5, 0, 0, 0.5, 0.5, 0.5},
+	    },
+	 },
+
+	 paramtype = "light",
+	 paramtype2 = "facedir",
+	 is_ground_content = nodedef.is_ground_content,
+   })
+
+   crafting.register_craft( -- Craft to stair
+      {
+	 output = "rp_partialblocks:stair_" .. name,
+	 items = {
+            node,
+	 },
+   })
+
+   if is_fuel then
+      local burntime
+      if full_node_burntime > 0 then
+	      -- Burntime is 75% of the origin node (if a fuel recipe was available)
+	      burntime = math.max(1, math.floor(output.time * 0.75))
+      else
+	      -- Fallback burntime
+	      burntime = 7
+      end
+      minetest.register_craft( -- Fuel
+	 {
+	    type = "fuel",
+	    recipe = "rp_partialblocks:stair_" .. name,
+	    burntime = burntime,
+      })
+   end
+end
+
diff --git a/mods/rp_partialblocks/crafts.lua b/mods/rp_partialblocks/crafts.lua
new file mode 100644
index 0000000..2f350aa
--- /dev/null
+++ b/mods/rp_partialblocks/crafts.lua
@@ -0,0 +1,45 @@
+-- Special partial blocks crafting recipes.
+-- Note: The regular crafting recipes are automatically registered
+-- by the API.
+
+-- Recipes to craft metal and coal stairs/slabs back to ingots/lumps
+-- at a small loss.
+local mats = {
+	{ "rp_default:lump_coal", "coal" },
+	{ "rp_default:ingot_steel", "steel" },
+	{ "rp_default:ingot_carbon_steel", "carbon_steel" },
+	{ "rp_default:ingot_bronze", "bronze" },
+	{ "rp_default:ingot_copper", "copper" },
+	{ "rp_default:ingot_tin", "tin" },
+	{ "rp_default:ingot_wrought_iron", "wrought_iron" },
+	{ "rp_gold:ingot_gold", "gold" },
+}
+for m=1, #mats do
+	local mat = mats[m]
+	crafting.register_craft({
+		output = mat[1] .." 4",
+		items = { "rp_partialblocks:slab_" .. mat[2] },
+	})
+	crafting.register_craft({
+		output = mat[1] .. " 6",
+		items = { "rp_partialblocks:stair_" .. mat[2] },
+	})
+end
+
+-- Reed cooking
+minetest.register_craft(
+   {
+      type = "cooking",
+      output = "rp_partialblocks:slab_dried_reed",
+      recipe = "rp_partialblocks:slab_reed",
+      cooktime = 5,
+})
+minetest.register_craft(
+   {
+      type = "cooking",
+      output = "rp_partialblocks:stair_dried_reed",
+      recipe = "rp_partialblocks:stair_reed",
+      cooktime = 8,
+})
+
+
diff --git a/mods/rp_partialblocks/init.lua b/mods/rp_partialblocks/init.lua
index d22c750..d4b8a75 100644
--- a/mods/rp_partialblocks/init.lua
+++ b/mods/rp_partialblocks/init.lua
@@ -1,329 +1,10 @@
-
 --
 -- Partial blocks mod
 --
-local S = minetest.get_translator("rp_partialblocks")
 
 partialblocks = {}
 
-local adv_slab_tex = function(name, tex_prefix)
-	local t1 = minetest.registered_nodes[name].tiles[1]
-	local t2 = tex_prefix.."_slab.png"
-	return { t1, t1, t2 }
-end
-local adv_stair_tex = function(name, tex_prefix)
-	local t1 = minetest.registered_nodes[name].tiles[1]
-	local t2 = tex_prefix.."_stair.png"
-	local t3 = tex_prefix.."_slab.png"
-	return { t3, t1, t2.."^[transformFX", t2, t1, t3 }
-end
-
-function partialblocks.register_material(name, desc_slab, desc_stair, node, groups, is_fuel, tiles_slab, tiles_stair)
-   local nodedef = minetest.registered_nodes[node]
-
-   if nodedef == nil then
-      minetest.log("warning", "[rp_partialblocks] Cannot find node for partialblock: " .. node)
-
-      return
-   end
-
-   -- Slab
-   local tiles
-   if tiles_slab then
-      -- Advanced slab tiles
-      if type(tiles_slab) == "string" and string.sub(tiles_slab, 1, 2) == "a|" then
-          local texpref = string.sub(tiles_slab, 3)
-	  tiles = adv_slab_tex(node, texpref)
-      else
-      -- Explicit slab tiles
-          tiles = tiles_slab
-      end
-   else
-      -- Slab tiles from base node
-      tiles = nodedef.tiles
-   end
-   local groups_slab
-   if not groups then
-      groups_slab = table.copy(nodedef.groups)
-   else
-      groups_slab = table.copy(groups)
-   end
-   groups_slab.slab = 1
-
-   minetest.register_node(
-      "rp_partialblocks:slab_" .. name,
-      {
-	 tiles = tiles,
-	 groups = groups_slab,
-	 sounds = nodedef.sounds,
-
-	 description = desc_slab,
-	 drawtype = "nodebox",
-
-	 node_box = {
-	    type = "fixed",
-	    fixed = {-0.5, -0.5, -0.5, 0.5, 0, 0.5},
-	 },
-
-	 paramtype = "light",
-	 is_ground_content = nodedef.is_ground_content,
-
-         on_place = function(itemstack, placer, pointed_thing)
-            -- Slab on slab placement creates full block
-            if not (pointed_thing.above.y > pointed_thing.under.y) then
-               itemstack = minetest.item_place(itemstack, placer, pointed_thing)
-               return itemstack
-            end
-            local pos = pointed_thing.under
-            local shift = false
-            if placer:is_player() then
-               -- Place node normally when sneak is pressed
-               shift = placer:get_player_control().sneak
-            end
-            if (not shift) and minetest.get_node(pos).name == itemstack:get_name()
-            and itemstack:get_count() >= 1 then
-               minetest.set_node(pos, {name = node})
-
-	       if not minetest.is_creative_enabled(placer:get_player_name()) then
-                   itemstack:take_item()
-               end
-
-            else
-               itemstack = minetest.item_place(itemstack, placer, pointed_thing)
-            end
-            return itemstack
-         end,
-   })
-
-   crafting.register_craft( -- Craft to slab
-      {
-	 output = "rp_partialblocks:slab_" .. name .. " 2",
-	 items = {
-	    node,
-	 },
-   })
-
-   local full_node_burntime
-   local output = minetest.get_craft_result({
-      method = "fuel",
-      width = 1,
-      items = {node},
-   })
-   full_node_burntime = output.time
-
-   if is_fuel then
-      local burntime
-      if full_node_burntime > 0 then
-	      -- Burntime is 50% of the origin node (if a fuel recipe was available)
-	      burntime = math.max(1, math.floor(output.time * 0.5))
-      else
-	      -- Fallback burntime
-	      burntime = 7
-      end
-      minetest.register_craft( -- Fuel
-	 {
-	    type = "fuel",
-	    recipe = "rp_partialblocks:slab_" .. name,
-	    burntime = burntime,
-      })
-   end
-
-   -- Stair
-
-   local tiles
-   if tiles_stair then
-      if type(tiles_stair) == "string" and string.sub(tiles_stair, 1, 2) == "a|" then
-      -- Advanced stair tiles
-          local texpref = string.sub(tiles_stair, 3)
-	  tiles = adv_stair_tex(node, texpref)
-      elseif tiles_stair == "w" then
-      -- World-aligned stair textures
-          local texname = minetest.registered_nodes[node].tiles[1]
-          tiles = {{ name = texname, align_style = "world" }}
-      else
-      -- Explicit stair tiles
-          tiles = tiles_stair
-      end
-   else
-      -- Stair tiles from base node
-      tiles = nodedef.tiles
-   end
-
-   local groups_stair
-   if not groups then
-      groups_stair = table.copy(nodedef.groups)
-   else
-      groups_stair = table.copy(groups)
-   end
-   groups_stair.stair = 1
-
-   minetest.register_node(
-      "rp_partialblocks:stair_" .. name,
-      {
-	 tiles = tiles,
-	 groups = groups_stair,
-	 sounds = nodedef.sounds,
-
-	 description = desc_stair,
-	 drawtype = "nodebox",
-
-	 node_box = {
-	    type = "fixed",
-	    fixed = {
-	       {-0.5, -0.5, -0.5, 0.5, 0, 0.5},
-	       {-0.5, 0, 0, 0.5, 0.5, 0.5},
-	    },
-	 },
-
-	 paramtype = "light",
-	 paramtype2 = "facedir",
-	 is_ground_content = nodedef.is_ground_content,
-   })
-
-   crafting.register_craft( -- Craft to stair
-      {
-	 output = "rp_partialblocks:stair_" .. name,
-	 items = {
-            node,
-	 },
-   })
-
-   if is_fuel then
-      local burntime
-      if full_node_burntime > 0 then
-	      -- Burntime is 75% of the origin node (if a fuel recipe was available)
-	      burntime = math.max(1, math.floor(output.time * 0.75))
-      else
-	      -- Fallback burntime
-	      burntime = 7
-      end
-      minetest.register_craft( -- Fuel
-	 {
-	    type = "fuel",
-	    recipe = "rp_partialblocks:stair_" .. name,
-	    burntime = burntime,
-      })
-   end
-end
-
-local pbp = "partialblocks_" -- partial blocks texture prefix
-
--- Stonelike materials
-
-partialblocks.register_material(
-   "cobble", S("Cobble Slab"), S("Cobble Stair"), "rp_default:cobble", {cracky=3}, false, nil, "w")
-
-partialblocks.register_material(
-   "stone", S("Stone Slab"), S("Stone Stair"), "rp_default:stone", {cracky=2}, false, nil, "w")
-
-partialblocks.register_material(
-   "sandstone", S("Sandstone Slab"), S("Sandstone Stair"), "rp_default:sandstone", {cracky=3}, false, nil, "w")
-
-partialblocks.register_material(
-   "brick", S("Brick Slab"), S("Brick Stair"), "rp_default:brick", {cracky=2}, false, nil, "w")
-
--- Woodlike
-
-partialblocks.register_material(
-   "wood", S("Wooden Slab"), S("Wooden Stair"), "rp_default:planks", {snappy = 3, choppy = 3, oddly_breakable_by_hand = 3}, true, nil, "w")
-
-partialblocks.register_material(
-   "oak", S("Oak Slab"), S("Oak Stair"), "rp_default:planks_oak", {snappy = 3, choppy = 3, oddly_breakable_by_hand = 3}, true, nil, "w")
-
-partialblocks.register_material(
-   "birch", S("Birch Slab"), S("Birch Stair"), "rp_default:planks_birch", {snappy = 3, choppy = 3, oddly_breakable_by_hand = 3}, true, nil, "w")
-
-partialblocks.register_material(
-   "reed", S("Reed Slab"), S("Reed Stair"), "rp_default:reed_block", {snappy = 2, fall_damage_add_percent=-10}, true, nil, "w")
-
-partialblocks.register_material(
-   "dried_reed", S("Dried Reed Slab"), S("Dried Reed Stair"), "rp_default:dried_reed_block", {snappy = 2, fall_damage_add_percent=-15}, true, nil, "w")
-
--- Frames
-
-partialblocks.register_material(
-   "frame", S("Frame Slab"), S("Frame Stair"), "rp_default:frame", {choppy = 2, oddly_breakable_by_hand = 1}, true, "a|"..pbp.."frame", "a|"..pbp.."frame")
-
-partialblocks.register_material(
-   "reinforced_frame", S("Reinforced Frame Slab"), S("Reinforced Frame Stair"), "rp_default:reinforced_frame", {choppy = 1}, true, "a|"..pbp.."reinforced_frame", "a|"..pbp.."reinforced_frame")
-
-partialblocks.register_material(
-   "reinforced_cobble", S("Reinforced Cobble Slab"), S("Reinforced Cobble Stair"), "rp_default:reinforced_cobble", {cracky = 1}, false, "a|"..pbp.."reinforced_cobbles", "a|"..pbp.."reinforced_cobbles")
-
--- Misc. blocks
-
-partialblocks.register_material(
-   "coal", S("Coal Slab"), S("Coal Stair"), "rp_default:block_coal", { cracky = 3 }, true, "a|"..pbp.."block_coal", "a|"..pbp.."block_coal")
-
-partialblocks.register_material(
-   "steel", S("Steel Slab"), S("Steel Stair"), "rp_default:block_steel", { cracky = 2 }, false, "a|"..pbp.."block_steel", "a|"..pbp.."block_steel")
-
-partialblocks.register_material(
-   "carbon_steel", S("Carbon Steel Slab"), S("Carbon Steel Stair"), "rp_default:block_carbon_steel", { cracky = 1 }, false, "a|"..pbp.."block_carbon_steel", "a|"..pbp.."block_carbon_steel")
-
-partialblocks.register_material(
-   "wrought_iron", S("Wrought Iron Slab"), S("Wrought Iron Stair"), "rp_default:block_wrought_iron", { cracky = 2, magnetic = 1 }, false, "a|"..pbp.."block_wrought_iron", "a|"..pbp.."block_wrought_iron")
-
-partialblocks.register_material(
-   "bronze", S("Bronze Slab"), S("Bronze Stair"), "rp_default:block_bronze", { cracky = 1 }, false, "a|"..pbp.."block_bronze", "a|"..pbp.."block_bronze")
-
-partialblocks.register_material(
-   "copper", S("Copper Slab"), S("Copper Stair"), "rp_default:block_copper", { cracky = 2 }, false, "a|"..pbp.."block_copper", "a|"..pbp.."block_copper")
-
-partialblocks.register_material(
-   "tin", S("Tin Slab"), S("Tin Stair"), "rp_default:block_tin", { cracky = 2 }, false, "a|"..pbp.."block_tin", "a|"..pbp.."block_tin")
-
-partialblocks.register_material(
-   "gold", S("Gold Slab"), S("Gold Stair"), "rp_gold:block_gold", { cracky = 2 }, false, "a|"..pbp.."block_gold", "a|"..pbp.."block_gold")
-
--- Recipes to craft metal and coal stairs/slabs back to ingots/lumps
--- at a small loss.
-local mats = {
-	{ "rp_default:lump_coal", "coal" },
-	{ "rp_default:ingot_steel", "steel" },
-	{ "rp_default:ingot_carbon_steel", "carbon_steel" },
-	{ "rp_default:ingot_bronze", "bronze" },
-	{ "rp_default:ingot_copper", "copper" },
-	{ "rp_default:ingot_tin", "tin" },
-	{ "rp_default:ingot_wrought_iron", "wrought_iron" },
-	{ "rp_gold:ingot_gold", "gold" },
-}
-for m=1, #mats do
-	local mat = mats[m]
-	crafting.register_craft({
-		output = mat[1] .." 4",
-		items = { "rp_partialblocks:slab_" .. mat[2] },
-	})
-	crafting.register_craft({
-		output = mat[1] .. " 6",
-		items = { "rp_partialblocks:stair_" .. mat[2] },
-	})
-end
-
-minetest.register_craft(
-   {
-      type = "cooking",
-      output = "rp_partialblocks:slab_dried_reed",
-      recipe = "rp_partialblocks:slab_reed",
-      cooktime = 5,
-})
-minetest.register_craft(
-   {
-      type = "cooking",
-      output = "rp_partialblocks:stair_dried_reed",
-      recipe = "rp_partialblocks:stair_reed",
-      cooktime = 8,
-})
-
-
-local cs_stair_tiles = {
-	"default_compressed_sandstone.png",
-	"default_compressed_sandstone_top.png",
-	"partialblocks_compressed_sandstone_stair.png^[transformFX",
-	"partialblocks_compressed_sandstone_stair.png",
-	"default_compressed_sandstone.png",
-	"default_compressed_sandstone.png" }
-partialblocks.register_material(
-   "compressed_sandstone", S("Compressed Sandstone Slab"), S("Compressed Sandstone Stair"), "rp_default:compressed_sandstone", { cracky = 2 }, false, nil, cs_stair_tiles)
-
-dofile(minetest.get_modpath("rp_partialblocks").."/aliases.lua")
+dofile(minetest.get_modpath("rp_partialblocks").."/api.lua") -- API function(s)
+dofile(minetest.get_modpath("rp_partialblocks").."/register.lua") -- node registrations
+dofile(minetest.get_modpath("rp_partialblocks").."/crafts.lua") -- special crafting recipes
+dofile(minetest.get_modpath("rp_partialblocks").."/aliases.lua") -- node aliases
diff --git a/mods/rp_partialblocks/register.lua b/mods/rp_partialblocks/register.lua
new file mode 100644
index 0000000..f1e5c21
--- /dev/null
+++ b/mods/rp_partialblocks/register.lua
@@ -0,0 +1,89 @@
+--
+-- Partial blocks node registrations
+--
+local S = minetest.get_translator("rp_partialblocks")
+
+local pbp = "partialblocks_" -- partial blocks texture prefix for advanced textures
+
+-- Stonelike materials
+
+partialblocks.register_material(
+   "cobble", S("Cobble Slab"), S("Cobble Stair"), "rp_default:cobble", {cracky=3}, false, nil, "w")
+
+partialblocks.register_material(
+   "stone", S("Stone Slab"), S("Stone Stair"), "rp_default:stone", {cracky=2}, false, nil, "w")
+
+partialblocks.register_material(
+   "sandstone", S("Sandstone Slab"), S("Sandstone Stair"), "rp_default:sandstone", {cracky=3}, false, nil, "w")
+
+partialblocks.register_material(
+   "brick", S("Brick Slab"), S("Brick Stair"), "rp_default:brick", {cracky=2}, false, nil, "w")
+
+-- Woodlike
+
+partialblocks.register_material(
+   "wood", S("Wooden Slab"), S("Wooden Stair"), "rp_default:planks", {snappy = 3, choppy = 3, oddly_breakable_by_hand = 3}, true, nil, "w")
+
+partialblocks.register_material(
+   "oak", S("Oak Slab"), S("Oak Stair"), "rp_default:planks_oak", {snappy = 3, choppy = 3, oddly_breakable_by_hand = 3}, true, nil, "w")
+
+partialblocks.register_material(
+   "birch", S("Birch Slab"), S("Birch Stair"), "rp_default:planks_birch", {snappy = 3, choppy = 3, oddly_breakable_by_hand = 3}, true, nil, "w")
+
+-- Reed
+
+partialblocks.register_material(
+   "reed", S("Reed Slab"), S("Reed Stair"), "rp_default:reed_block", {snappy = 2, fall_damage_add_percent=-10}, true, nil, "w")
+
+partialblocks.register_material(
+   "dried_reed", S("Dried Reed Slab"), S("Dried Reed Stair"), "rp_default:dried_reed_block", {snappy = 2, fall_damage_add_percent=-15}, true, nil, "w")
+
+-- Frames
+
+partialblocks.register_material(
+   "frame", S("Frame Slab"), S("Frame Stair"), "rp_default:frame", {choppy = 2, oddly_breakable_by_hand = 1}, true, "a|"..pbp.."frame", "a|"..pbp.."frame")
+
+partialblocks.register_material(
+   "reinforced_frame", S("Reinforced Frame Slab"), S("Reinforced Frame Stair"), "rp_default:reinforced_frame", {choppy = 1}, true, "a|"..pbp.."reinforced_frame", "a|"..pbp.."reinforced_frame")
+
+partialblocks.register_material(
+   "reinforced_cobble", S("Reinforced Cobble Slab"), S("Reinforced Cobble Stair"), "rp_default:reinforced_cobble", {cracky = 1}, false, "a|"..pbp.."reinforced_cobbles", "a|"..pbp.."reinforced_cobbles")
+
+-- Coal
+
+partialblocks.register_material(
+   "coal", S("Coal Slab"), S("Coal Stair"), "rp_default:block_coal", { cracky = 3 }, true, "a|"..pbp.."block_coal", "a|"..pbp.."block_coal")
+
+-- Metal
+
+partialblocks.register_material(
+   "steel", S("Steel Slab"), S("Steel Stair"), "rp_default:block_steel", { cracky = 2 }, false, "a|"..pbp.."block_steel", "a|"..pbp.."block_steel")
+
+partialblocks.register_material(
+   "carbon_steel", S("Carbon Steel Slab"), S("Carbon Steel Stair"), "rp_default:block_carbon_steel", { cracky = 1 }, false, "a|"..pbp.."block_carbon_steel", "a|"..pbp.."block_carbon_steel")
+
+partialblocks.register_material(
+   "wrought_iron", S("Wrought Iron Slab"), S("Wrought Iron Stair"), "rp_default:block_wrought_iron", { cracky = 2, magnetic = 1 }, false, "a|"..pbp.."block_wrought_iron", "a|"..pbp.."block_wrought_iron")
+
+partialblocks.register_material(
+   "bronze", S("Bronze Slab"), S("Bronze Stair"), "rp_default:block_bronze", { cracky = 1 }, false, "a|"..pbp.."block_bronze", "a|"..pbp.."block_bronze")
+
+partialblocks.register_material(
+   "copper", S("Copper Slab"), S("Copper Stair"), "rp_default:block_copper", { cracky = 2 }, false, "a|"..pbp.."block_copper", "a|"..pbp.."block_copper")
+
+partialblocks.register_material(
+   "tin", S("Tin Slab"), S("Tin Stair"), "rp_default:block_tin", { cracky = 2 }, false, "a|"..pbp.."block_tin", "a|"..pbp.."block_tin")
+
+partialblocks.register_material(
+   "gold", S("Gold Slab"), S("Gold Stair"), "rp_gold:block_gold", { cracky = 2 }, false, "a|"..pbp.."block_gold", "a|"..pbp.."block_gold")
+
+-- Compressed sandstone
+local cs_stair_tiles = {
+	"default_compressed_sandstone.png",
+	"default_compressed_sandstone_top.png",
+	"partialblocks_compressed_sandstone_stair.png^[transformFX",
+	"partialblocks_compressed_sandstone_stair.png",
+	"default_compressed_sandstone.png",
+	"default_compressed_sandstone.png" }
+partialblocks.register_material(
+   "compressed_sandstone", S("Compressed Sandstone Slab"), S("Compressed Sandstone Stair"), "rp_default:compressed_sandstone", { cracky = 2 }, false, nil, cs_stair_tiles)