diff --git a/mods/CORE/pyutest/util.lua b/mods/CORE/pyutest/util.lua
index cc8acf4..abeeb27 100644
--- a/mods/CORE/pyutest/util.lua
+++ b/mods/CORE/pyutest/util.lua
@@ -271,3 +271,10 @@ PyuTest.give_item_or_drop = function(stack, inventory, listname, pos)
     minetest.add_item(pos, leftover)
   end
 end
+
+PyuTest.get_biome_def = function(pos)
+  local data = minetest.get_biome_data(pos)
+  if not data then return end
+
+  return minetest.registered_biomes[minetest.get_biome_name(data.biome)]
+end
diff --git a/mods/ENTITIES/pyutest_entities/api.lua b/mods/ENTITIES/pyutest_entities/api.lua
index 60f9071..161234f 100644
--- a/mods/ENTITIES/pyutest_entities/api.lua
+++ b/mods/ENTITIES/pyutest_entities/api.lua
@@ -6,7 +6,7 @@ PATH_FIND_ALGORITHM = "Dijkstra"
 PyuTest.ENTITY_BLOOD_AMOUNT = 6
 PyuTest.HUMAN_LIKE_CBOX = {-0.25, -1, -0.25, 0.25, 1, 0.25}
 
-PyuTest.get_nearest_entity = function (entity, pos, range, only_player)
+PyuTest.get_nearest_entity = function (entity, pos, range, only_player, dont_ignore_allies)
   local closet_distance = math.huge
   local nearest
 
@@ -28,7 +28,15 @@ PyuTest.get_nearest_entity = function (entity, pos, range, only_player)
         -- Ignore items
         if e then
           if e.name ~= "__builtin:item" then
-            set_nearest_and_distance(obj, dist)
+            if not dont_ignore_allies then
+              local self = entity:get_luaentity()
+
+              if self then
+                if self.name ~= e.name then
+                  set_nearest_and_distance(obj, dist)
+                end
+              end
+            end
           end
         else
           set_nearest_and_distance(obj, dist)
@@ -94,7 +102,7 @@ local class = {}
 
 function class:do_physics()
   local obj = self.object
-  local data = self.data
+  local state = self.state
   local cfg = self.options
   local moveresult = self.moveresult
   local pos = obj:get_pos()
@@ -109,31 +117,31 @@ end
 
 function class:path_find_nearest_entity(follow_only_player)
   local obj = self.object
-  local data = self.data
+  local state = self.state
   local cfg = self.options
   local pos = obj:get_pos()
 
-  if data.target.path == nil then
-    data.target.object = PyuTest.get_nearest_entity(obj, pos, cfg.sight_range, follow_only_player)
+  if state.target.path == nil then
+    state.target.object = PyuTest.get_nearest_entity(obj, pos, cfg.sight_range, follow_only_player)
 
-    if data.target.object == nil then
+    if state.target.object == nil then
       return
     end
 
-    data.target.position = data.target.object:get_pos()
-    data.target.path = minetest.find_path(pos, data.target.position, cfg.view_range, cfg.max_jump, cfg.max_drop, PATH_FIND_ALGORITHM)
-    data.target.pathindex = 1
+    state.target.position = state.target.object:get_pos()
+    state.target.path = minetest.find_path(pos, state.target.position, cfg.view_range, cfg.max_jump, cfg.max_drop, PATH_FIND_ALGORITHM)
+    state.target.pathindex = 1
   else
-    if data.target.pathindex == #data.target.path then
-      data.target.path = nil
-      data.target.object = nil
-      data.target.position = nil
-      data.target.pathindex = nil
+    if state.target.pathindex == #state.target.path then
+      state.target.path = nil
+      state.target.object = nil
+      state.target.position = nil
+      state.target.pathindex = nil
     else
-      local p = data.target.path[data.target.pathindex]
+      local p = state.target.path[state.target.pathindex]
       -- obj:set_velocity(p * dtime)
       obj:move_to(p, true)
-      data.target.pathindex = data.target.pathindex + 1
+      state.target.pathindex = state.target.pathindex + 1
     end
   end
 end
@@ -182,7 +190,7 @@ PyuTest.make_mob = function (name, properties, options)
       infotext = "",
     }),
     options = cfg,
-    data = {
+    state = {
       target = {
         object = nil,
         position = nil,
diff --git a/mods/ITEMS/pyutest_blocks/basic.lua b/mods/ITEMS/pyutest_blocks/basic.lua
index 6999513..9943eeb 100644
--- a/mods/ITEMS/pyutest_blocks/basic.lua
+++ b/mods/ITEMS/pyutest_blocks/basic.lua
@@ -152,7 +152,7 @@ PyuTest.make_building_blocks("pyutest_blocks:ice", "Ice", { "pyutest-ice.png" },
   acid_vulnerable = 1,
   slippery = 4,
   cracky = PyuTest.BLOCK_FAST,
-  thawable = 1
+  thawable = 1,
 })
 
 PyuTest.make_building_blocks("pyutest_blocks:molten_rock", "Molten Rock", { "pyutest-molten-rock.png" }, nil, {
diff --git a/mods/ITEMS/pyutest_blocks/special.lua b/mods/ITEMS/pyutest_blocks/special.lua
index 8086e90..cbb354c 100644
--- a/mods/ITEMS/pyutest_blocks/special.lua
+++ b/mods/ITEMS/pyutest_blocks/special.lua
@@ -196,6 +196,14 @@ PyuTest.make_node("pyutest_blocks:bedrock", "Bedrock", {
   is_ground_content = false
 })
 
+PyuTest.make_node("pyutest_blocks:weak_ice", "Weak Ice", {
+  cracky = PyuTest.BLOCK_FAST
+}, {"pyutest-ice.png"}, {
+  on_walk_over = function(pos)
+    minetest.set_node(pos, {name = "pyutest_blocks:water_source"})
+  end
+})
+
 minetest.register_abm({
   label = "Sponge Loop",
   nodenames = { "pyutest_blocks:sponge" },
diff --git a/mods/WORLD/pyutest_environment/init.lua b/mods/WORLD/pyutest_environment/init.lua
index ab8fc74..da6a092 100644
--- a/mods/WORLD/pyutest_environment/init.lua
+++ b/mods/WORLD/pyutest_environment/init.lua
@@ -1,19 +1,39 @@
 minetest.register_abm({
-  label = "Water freezing",
+  label = "Water freezing/evaporating",
   nodenames = {"group:water"},
   interval = 3,
   chance = 2.5,
   catch_up = true,
   action = function (pos)
-    local heat = minetest.get_heat(pos) or 50
+    local def = PyuTest.get_biome_def(pos)
+    if not def then return end
+
+    local heat = def.heat_point or 50
     local found = minetest.find_node_near(pos, 2, {"group:emits_heat"}) ~= nil
 
-    if heat < 12 and not found then
+    if heat <= 12 and not found then
       minetest.set_node(pos, {name = "pyutest_blocks:ice_block"})
     end
   end
 })
 
+minetest.register_abm({
+  label = "Water evaporating",
+  nodenames = {"group:water"},
+  interval = 0.1,
+  chance = 1,
+  action = function (pos)
+    local def = PyuTest.get_biome_def(pos)
+    if not def then return end
+
+    local heat = def.heat_point or 50
+
+    if heat >= 100  then
+      minetest.remove_node(pos)
+    end
+  end
+})
+
 minetest.register_abm({
   label = "Ice thawing",
   nodenames = {"group:thawable"},
diff --git a/mods/WORLD/pyutest_mapgen/biomes.lua b/mods/WORLD/pyutest_mapgen/biomes.lua
index 95b19ca..d103562 100644
--- a/mods/WORLD/pyutest_mapgen/biomes.lua
+++ b/mods/WORLD/pyutest_mapgen/biomes.lua
@@ -158,7 +158,7 @@ if PyuTest.is_flat() then
 
     heat_point = 50,
     humidity_point = 50,
-  }, true)
+  })
 
   return
 end
diff --git a/textures/pyutest-crystal-lantern.png b/textures/pyutest-crystal-lantern.png
index 07c38c8..6e263c0 100644
Binary files a/textures/pyutest-crystal-lantern.png and b/textures/pyutest-crystal-lantern.png differ
diff --git a/textures/pyutest-ice-old.png b/textures/pyutest-ice-old.png
new file mode 100644
index 0000000..5feebd0
Binary files /dev/null and b/textures/pyutest-ice-old.png differ