diff --git a/src/scriptengine/script_engine.cpp b/src/scriptengine/script_engine.cpp
index 250204d5e..a851dbe67 100644
--- a/src/scriptengine/script_engine.cpp
+++ b/src/scriptengine/script_engine.cpp
@@ -177,7 +177,17 @@ namespace Scripting
     void ScriptEngine::runFunction(std::string function_name)
     {
         std::function<void(asIScriptContext*)> callback;
-        runFunction(function_name, callback);
+        std::function<void(asIScriptContext*)> get_return_value;
+        runFunction(function_name, callback, get_return_value);
+    }
+
+    //-----------------------------------------------------------------------------
+
+    void ScriptEngine::runFunction(std::string function_name,
+        std::function<void(asIScriptContext*)> callback)
+    {
+        std::function<void(asIScriptContext*)> get_return_value;
+        runFunction(function_name, callback, get_return_value);
     }
 
     //-----------------------------------------------------------------------------
@@ -185,7 +195,9 @@ namespace Scripting
     /** runs the specified script
     *  \param string scriptName = name of script to run
     */
-    void ScriptEngine::runFunction(std::string function_name, std::function<void(asIScriptContext*)> callback)
+    void ScriptEngine::runFunction(std::string function_name,
+        std::function<void(asIScriptContext*)> callback,
+        std::function<void(asIScriptContext*)> get_return_value)
     {
         int r; //int for error checking
 
@@ -199,11 +211,11 @@ namespace Scripting
         if (cached_script == m_loaded_files.end())
         {
             // Compile the script code
-            Log::debug("Scripting", "Compiling script '%s' (was not in cache)", script_filename.c_str());
+            Log::info("Scripting", "Checking for script file '%s'", script_filename.c_str());
             r = compileScript(m_engine, script_filename);
             if (r < 0)
             {
-                Log::debug("Scripting", "Script '%s' is not available", script_filename.c_str());
+                Log::info("Scripting", "Script '%s' is not available", script_filename.c_str());
                 m_loaded_files[script_filename] = false;
                 m_functions_cache[function_name] = NULL; // remember that this script is unavailable
                 return;
@@ -306,6 +318,9 @@ namespace Scripting
             // Retrieve the return value from the context here (for scripts that return values)
             // <type> returnValue = ctx->getReturnType(); for example
             //float returnValue = ctx->GetReturnFloat();
+
+            if (get_return_value)
+                get_return_value(ctx);
         }
 
         // We must release the contexts when no longer using them
diff --git a/src/scriptengine/script_engine.hpp b/src/scriptengine/script_engine.hpp
index 5a7e01e88..d3b304178 100644
--- a/src/scriptengine/script_engine.hpp
+++ b/src/scriptengine/script_engine.hpp
@@ -53,7 +53,11 @@ namespace Scripting
         ~ScriptEngine();
 
         void runFunction(std::string function_name);
-        void runFunction(std::string function_name, std::function<void(asIScriptContext*)> callback);
+        void runFunction(std::string function_name,
+            std::function<void(asIScriptContext*)> callback);
+        void runFunction(std::string function_name,
+            std::function<void(asIScriptContext*)> callback,
+            std::function<void(asIScriptContext*)> get_return_value);
         void evalScript(std::string script_fragment);
         void cleanupCache();
 
diff --git a/src/tracks/track.cpp b/src/tracks/track.cpp
index b5d447bb1..42b9c87b8 100644
--- a/src/tracks/track.cpp
+++ b/src/tracks/track.cpp
@@ -1116,6 +1116,8 @@ bool Track::loadMainTrack(const XMLNode &root)
         // some static meshes are conditional
         std::string condition;
         n->get("if", &condition);
+
+        // TODO: convert "if" and "ifnot" to scripting.
         if (condition == "splatting")
         {
             if (!irr_driver->supportsSplatting()) continue;
@@ -1193,15 +1195,15 @@ bool Track::loadMainTrack(const XMLNode &root)
 
             if (!shown) continue;
         }
-        else if (condition == "allchallenges")
-        {
-            // allow ONE unsolved challenge : the last one
-            if (getNumOfCompletedChallenges() < m_challenges.size() - 1)
-                continue;
-        }
         else if (condition.size() > 0)
         {
-            Log::error("track", "Unknown condition <%s>\n", condition.c_str());
+            unsigned char result = -1;
+            Scripting::ScriptEngine* script_engine = World::getWorld()->getScriptEngine();
+            std::function<void(asIScriptContext*)> null_callback;
+            script_engine->runFunction("bool " + condition + "()", null_callback,
+                [&](asIScriptContext* ctx) { result = ctx->GetReturnByte(); });
+            if (result == 0)
+                continue;
         }
 
         std::string neg_condition;
@@ -1210,18 +1212,18 @@ bool Track::loadMainTrack(const XMLNode &root)
         {
             if (irr_driver->supportsSplatting()) continue;
         }
-        else if (neg_condition == "allchallenges")
-        {
-            // allow ONE unsolved challenge : the last one
-            if (getNumOfCompletedChallenges() >= m_challenges.size() - 1)
-                continue;
-        }
         else if (neg_condition.size() > 0)
         {
-            Log::error("track", "Unknown condition <%s>\n",
-                       neg_condition.c_str());
+            unsigned char result = -1;
+            Scripting::ScriptEngine* script_engine = World::getWorld()->getScriptEngine();
+            std::function<void(asIScriptContext*)> null_callback;
+            script_engine->runFunction("bool " + neg_condition + "()", null_callback,
+                [&](asIScriptContext* ctx) { result = ctx->GetReturnByte(); });
+            if (result != 0)
+                continue;
         }
 
+
         bool tangent = false;
         n->get("tangents", &tangent);