feat: Use probes to determine whether outdoors or not.

mods/ENVIRONMENT/mcl_weather/weather_core.lua

@@ -100,7 +100,35 @@ end
 function mcl_weather.is_outdoor(pos)
 	local cpos = {x=pos.x, y=pos.y+1, z=pos.z}
 	local dim = mcl_worlds.pos_to_dimension(cpos)
-	if minetest.get_node_light(cpos, 0.5) == 15 and dim == "overworld" then
+
+  local probe_is_outdoors = function ()
+    -- Place probes in a square around the player just above their head.
+    local probe_distance = {
+      x = 7,
+      y = 1,
+      z = 7
+    }
+
+    local probe_offsets = { -1, 0, 1 }
+    for _, x in ipairs(probe_offsets) do
+      for _, z in ipairs(probe_offsets) do
+        local probe_pos = {
+          x = cpos.x + x * probe_distance.x,
+          y = cpos.y + probe_distance.y,
+          z = cpos.z + z * probe_distance.z
+        }
+
+        local light = minetest.get_node_light(probe_pos, 0.5)
+        if light ~= nil and light == 15 then
+          return true
+        end
+      end
+    end
+    return false
+  end
+
+  -- If at least one probe is "outdoors", the player is considered outdoors.
+	if probe_is_outdoors() and dim == "overworld" then
 		return true
 	end
 	return false