Try Removing Error Message

api.lua

@@ -105,61 +105,103 @@ function liquid_physics.register_liquid(namespace, source_name, flowing_name)
     end
 
     --Overwrite source
-    source_liquid_def.liquid_range = 0
+    -- source_liquid_def.liquid_range = 0
     source_liquid_def.groups.liquid_physics = 1
 
-    core.register_node(":" .. source_liquid_name, source_liquid_def)
+    -- core.register_node(":" .. source_liquid_name, {
+    --     description                = source_liquid_def.description,
+    --     paramtype2                 = "flowingliquid",
+
+    --     drawtype                   = "flowingliquid",         -- Used by drawtype = "flowingliquid"
+    --     liquidtype                 = "",                      -- Flowing not needed here since condition is already met?
+
+    --     tiles                      = source_liquid_def.tiles, -- As needed by drawtype - copy from water
+    --     special_tiles              = source_liquid_def.tiles,
+    --     use_texture_alpha          = true,
+
+    --     liquid_renewable           = false, -- Disallow any kind of spreading
+    --     liquid_range               = 2,
+
+    --     buildable_to               = true,               -- For liquid_alternative_source = "test_water:test",
+
+    --     liquid_alternative_flowing = source_liquid_name, -- As requested in documentation
+
+    --     liquid_move_physics        = true,
+    --     walkable                   = false,
+
+    -- })
+
+    core.override_item(source_liquid_name, {
+        paramtype2 = "flowingliquid",
+        drawtype = "flowingliquid",
+        liquidtype = "",
+        liquid_renewable = false,
+        liquid_range = 2,
+        liquid_alternative_source = "",
+        liquid_alternative_flowing = source_liquid_name,
+        liquid_move_physics = true,
+        special_tiles = source_liquid_def.tiles,
+        groups = source_liquid_def.groups,
+        pointable = true,
+    }, nil)
+
+    -- core.register_node(":" .. source_liquid_name, source_liquid_def)
     liquid_physics._liquid_ids[source_liquid_name] = id
 
     local liquids = {}
     table.insert(liquids, "air")
 
     for i = 1, 7 do
-        local node_name = "liquid_physics:" .. namespace .. "_" .. source_name .. "_level_" .. i
-
-        local level_def = {
-            name = node_name,
-            description = source_liquid_def.description .. " Level " .. i,
-            tiles = source_liquid_def.tiles,
-            use_texture_alpha = source_liquid_def.use_texture_alpha,
-            paramtype = source_liquid_def.paramtype,
-            walkable = source_liquid_def.walkable,
-            pointable = source_liquid_def.pointable,
-            diggable = source_liquid_def.diggable,
-            buildable_to = source_liquid_def.buildable_to,
-            is_ground_content = source_liquid_def.is_ground_content,
-            drawtype = "nodebox",
-            drop = source_liquid_def.drop,
-            drowning = source_liquid_def.drowning,
-            liquidtype = "source",
-            liquid_alternative_flowing = node_name,
-            liquid_alternative_source = node_name,
-            liquid_range = 0,
-            liquid_viscosity = source_liquid_def.liquid_viscosity,
-            liquid_renewable = false,
-            waving = source_liquid_def.waving,
-            color = source_liquid_def.color,
-            node_box = {
-                type = "fixed",
-                fixed = {
-                    { -0.5, -0.5, -0.5, 0.5, -0.375 + (0.125 * (i - 1)), 0.5 },
-                },
-            },
-            collision_box = {
-                type = "fixed",
-                fixed = { { -0.5, -0.5, -0.5, 0.5, -0.375 + (0.125 * (i - 1)), 0.5 }, },
-            },
-            post_effect_color = source_liquid_def.post_effect_color,
-            groups = source_liquid_def.groups,
-            sounds = source_liquid_def.sounds,
-        }
-
-        core.register_node(":" .. node_name, level_def)
-        liquid_physics._liquid_ids[node_name] = id
-
-        table.insert(liquids, node_name)
+        liquid_physics._liquid_ids[source_liquid_name] = id
+        table.insert(liquids, source_liquid_name)
     end
 
+    -- for i = 1, 7 do
+    --     local node_name = "liquid_physics:" .. namespace .. "_" .. source_name .. "_level_" .. i
+
+    --     local level_def = {
+    --         name = node_name,
+    --         description = source_liquid_def.description .. " Level " .. i,
+    --         tiles = source_liquid_def.tiles,
+    --         use_texture_alpha = source_liquid_def.use_texture_alpha,
+    --         paramtype = source_liquid_def.paramtype,
+    --         walkable = source_liquid_def.walkable,
+    --         pointable = source_liquid_def.pointable,
+    --         diggable = source_liquid_def.diggable,
+    --         buildable_to = source_liquid_def.buildable_to,
+    --         is_ground_content = source_liquid_def.is_ground_content,
+    --         drawtype = "nodebox",
+    --         drop = source_liquid_def.drop,
+    --         drowning = source_liquid_def.drowning,
+    --         liquidtype = "source",
+    --         liquid_alternative_flowing = node_name,
+    --         liquid_alternative_source = node_name,
+    --         liquid_range = 0,
+    --         liquid_viscosity = source_liquid_def.liquid_viscosity,
+    --         liquid_renewable = false,
+    --         waving = source_liquid_def.waving,
+    --         color = source_liquid_def.color,
+    --         node_box = {
+    --             type = "fixed",
+    --             fixed = {
+    --                 { -0.5, -0.5, -0.5, 0.5, -0.375 + (0.125 * (i - 1)), 0.5 },
+    --             },
+    --         },
+    --         collision_box = {
+    --             type = "fixed",
+    --             fixed = { { -0.5, -0.5, -0.5, 0.5, -0.375 + (0.125 * (i - 1)), 0.5 }, },
+    --         },
+    --         post_effect_color = source_liquid_def.post_effect_color,
+    --         groups = source_liquid_def.groups,
+    --         sounds = source_liquid_def.sounds,
+    --     }
+
+    --     core.register_node(":" .. node_name, level_def)
+    --     liquid_physics._liquid_ids[node_name] = id
+
+    --     table.insert(liquids, node_name)
+    -- end
+
     table.insert(liquids, source_liquid_name)
 
     -- Finally, stop flowing
@@ -167,7 +209,9 @@ function liquid_physics.register_liquid(namespace, source_name, flowing_name)
     core.override_item(flowing_liquid_name, {
         liquid_range = 0,
         liquid_renewable = false,
-        groups = flowing_liquid_def.groups
+        liquid_alternative_source = "",
+        liquid_alternative_flowing = "",
+        groups = flowing_liquid_def.groups,
     }, nil)
     liquid_physics._liquid_ids[flowing_liquid_name] = id
 

internal.lua

@@ -74,7 +74,13 @@ function internal.new_lpn(hash, pos)
     local liquid_id = internal.get_liquid_id(node.name)
     local liquid_level = -1
     if liquid_id then
-        liquid_level = internal.get_liquid_level(liquid_id, node.name)
+        local node_level = core.get_node_level(pos)
+        if liquid_id == 0 then
+            node_level = 0
+        elseif node_level == 0 and node.name == liquid_physics.get_liquid_node_names(liquid_id)[8] then
+            node_level = 8
+        end
+        liquid_level = node_level --internal.get_liquid_level(liquid_id, node.name)
     end
     return {
         hash = hash,
@@ -100,6 +106,7 @@ end
 -- @param lpn table Liquid Physics Node
 function internal.set_node(lpn)
     core.set_node(lpn.pos, { name = internal.get_liquid_node_name(lpn.liquid_id, lpn.liquid_level) })
+    core.set_node_level(lpn.pos, lpn.liquid_level)
 end
 
 -- This node will be checked in the next cycle

physics.lua

@@ -224,6 +224,7 @@ core.register_on_mapblocks_changed(function(modified_blocks, modified_blocks_cou
     end
     -- Update only changed nodes from buffer
     for _, lpn in pairs(b) do
+        --core.chat_send_all(dump(lpn))
         if lpn.init_liquid_level ~= lpn.liquid_level then
             internal.set_node(lpn)
         end