diff --git a/scripts/base.js b/scripts/base.js
index e6a5908..a8934a1 100644
--- a/scripts/base.js
+++ b/scripts/base.js
@@ -315,6 +315,13 @@ Object.defineProperty(String.prototype, 'shift', {
   }
 });
 
+Object.defineProperty(String.prototype, 'strip_ext', {
+  value: function() {
+    var idx  = this.lastIndexOf('.');
+    if (idx === -1) return this.slice();
+    return this.slice(0,idx);
+  }
+});
 
 Object.defineProperty(String.prototype, 'ext', {
   value: function() {
@@ -326,7 +333,7 @@ Object.defineProperty(String.prototype, 'ext', {
 
 Object.defineProperty(String.prototype, 'set_ext', {
   value: function(val) {
-    return this.dir() + "/" + this.name() + val;
+    return this.dir() + this.name() + val;
   }
 });
 
@@ -348,7 +355,8 @@ Object.defineProperty(String.prototype, 'base', {
 Object.defineProperty(String.prototype, 'dir', {
   value: function() {
     var e = this.lastIndexOf('/');
-    return this.slice(0, e);
+    if (e === -1) return "";
+    return this.slice(0, e+1);
   }
 });
 
diff --git a/scripts/editor.js b/scripts/editor.js
index c5c157f..b9f4a9e 100644
--- a/scripts/editor.js
+++ b/scripts/editor.js
@@ -424,23 +424,7 @@ return;
       this.openpanel(saveaspanel);
       return;
     }
-
-    var lvl = this.edit_level.save();
-
-    Log.info("Saving level of size " + lvl.length + " bytes.");
-
-    slurpwrite(lvl, this.edit_level.file);
-    this.edit_level.filejson = lvl;
-    this.edit_level.check_dirty();
-
-    if (this.edit_level.script) {
-      var scriptfile = this.edit_level.file.replace('.lvl', '.js');
-      slurpwrite(this.edit_level.script, scriptfile);
-    }
-
-    Level.sync_file(this.edit_level.file);
   },
-
   
   clear_level() {
     if (this.edit_level) {
@@ -634,7 +618,6 @@ return;
     var ur = prototypes.get_ur(file);
     if (!ur) return;
     var obj = editor.edit_level.spawn(ur);
-    Log.warn(`editor loading ur ${file} with type ${JSON.stringify(prototypes.get_ur(file),null,2)}`);
     obj.pos = Mouse.worldpos;
     this.selectlist = [obj];
   },
@@ -665,18 +648,25 @@ return;
       group.forEach(function(x) { x.kill(); });
     }
   },
-  
-  saveas_check(file) {
-    if (!file) return;
+
+  /* Checking to save an entity as a subtype. */
+  saveas_check(sub) {
+    if (!sub) return;
+    var curur = prototypes.get_ur(sub);
     
-    if (!file.endsWith(".lvl"))
-      file = file + ".lvl";
-    
-    if (IO.exists(file)) {
+    if (curur) {
       notifypanel.action = editor.saveas;
-      this.openpanel(gen_notify("Level already exists with that name. Overwrite?", this.saveas.bind(this, file)));
-    } else
-      this.saveas(file);
+      this.openpanel(gen_notify("Entity already exists with that name. Overwrite?", this.saveas.bind(this, sub)));
+    } else {
+      var path = sub.replaceAll('.', '/') + ".json";
+      IO.slurpwrite(JSON.stringify(editor.selectlist[0],null,1), path);
+      var t = editor.selectlist[0].transform();
+      editor.selectlist[0].kill();
+      editor.unselect();
+      editor.load(sub);
+      editor.selectlist[0].pos = t.pos;
+      editor.selectlist[0].angle = t.angle;
+    }
   },
 
   saveas(file) {
@@ -718,16 +708,16 @@ editor.inputs['C-h'].doc = "Unhide all objects.";
 editor.inputs['C-e'] = function() { editor.openpanel(assetexplorer); };
 editor.inputs['C-e'].doc = "Open asset explorer.";
 
-editor.inputs['C-l'] = function() { editor.openpanel(entitylistpanel, true); };
+editor.inputs['C-l'] = function() { editor.openpanel(entitylistpanel); };
 editor.inputs['C-l'].doc = "Open list of spawned entities.";
 
-editor.inputs['C-i'] = function() {
+/*editor.inputs['C-i'] = function() {
   if (editor.selectlist.length !== 1) return;
   objectexplorer.obj = editor.selectlist[0];
   editor.openpanel(objectexplorer);
 };
 editor.inputs['C-i'].doc = "Open the object explorer for a selected object.";
-
+*/
 editor.inputs['C-d'] = function() {
   if (editor.selectlist.length === 0) return;
   var duped = editor.dup_objects(editor.selectlist);
@@ -873,6 +863,13 @@ editor.inputs.escape = function() { editor.openpanel(quitpanel); }
 editor.inputs.escape.doc = "Quit editor.";
 
 editor.inputs['C-s'] = function() {
+  if (editor.selectlist.length !== 1 || !editor.selectlist[0].dirty) return;
+  Log.warn(`Saving ur for ${editor.selectlist[0].toString()}`);
+  
+  Object.merge(editor.selectlist[0].ur, editor.selectlist[0].json_obj());
+  IO.slurpwrite(JSON.stringify(editor.selectlist[0].ur,null,1), editor.selectlist[0].toString() + ".json");
+  return;
+
   if (editor.edit_level.level) {
     if (!editor.edit_level.unique)
       editor.save_current();
@@ -889,6 +886,8 @@ editor.inputs['C-s'] = function() {
 editor.inputs['C-s'].doc = "Save selected.";
 
 editor.inputs['C-S'] = function() {
+  if (editor.selectlist.length !== 1) return;
+  saveaspanel.stem = this.selectlist[0].toString();
   editor.openpanel(saveaspanel);
 };
 editor.inputs['C-S'].doc = "Save selected as.";
@@ -1500,7 +1499,7 @@ var replpanel = Object.copy(inputpanel, {
     ecode += this.value;
     Log.say(this.value);
     this.value = "";
-    var ret = eval(ecode);
+    var ret = function() {return eval(ecode);}.call(editor.selectlist[0]);
     if (ret) Log.say(ret);
   },
 });
@@ -1707,7 +1706,7 @@ var openlevelpanel = Object.copy(inputpanel,  {
 var saveaspanel = Object.copy(inputpanel, {
   title: "save level as",
   action() {
-    editor.saveas_check(this.value);
+    editor.saveas_check(this.stem + "." + this.value);
   },
 });
 
diff --git a/scripts/entity.js b/scripts/entity.js
index 0139000..dc45f82 100644
--- a/scripts/entity.js
+++ b/scripts/entity.js
@@ -279,35 +279,7 @@ var gameobject = {
       },
 
       json_obj() {
-	function objdiff(from, to) {
-	  if (!to) return from; // Everything on from is unique
-	  var ret = {};
-
-	  for (var key in from) {
-	    if (!from[key] || !to[key]) continue;
-	    if (typeof from[key] === 'function') continue;
-	    if (typeof to === 'object' && !(key in to)) continue;
-
-	    if (typeof from[key] === 'object') {
-	      if ('ur' in from[key]) {
-		var urdiff = objdiff(from[key],from[key].ur);
-		if (urdiff && !urdiff.empty) ret[key] = urdiff;
-		continue;
-	      }
-	      var diff = objdiff(from[key], to[key]);
-	      if (diff && !diff.empty) ret[key] = diff;
-	      continue;
-	    }
-
-	    if (from[key] !== to[key])
-	      ret[key] = from[key];
-	  }
-	  if (ret.empty) return undefined;
-	  return ret;
-	}
-	var ur = Object.create(this.ur);
-	Object.assign(ur,objdiff(this,this.ur));
-	return ur;
+        return JSON.parse(JSON.stringify(this));
       },
       
       make_ur() {
@@ -317,6 +289,13 @@ var gameobject = {
 	return thisur;
       },
 
+      transform() {
+        var t = {};
+	t.pos = this.pos;
+	t.angle = this.angle;
+	return t;
+      },
+
       dup(diff) {
         var n = this.level.spawn(this.ur);
 	Object.totalmerge(n, this.make_ur());
@@ -468,49 +447,65 @@ for (var key in prototypes) {
 
 prototypes.save_gameobjects = function() { slurpwrite(JSON.stringify(gameobjects,null,2), "proto.json"); };
 
-/* Makes a new ur-type from a file. The file can define components. */
+/* Makes a new ur-type from disk. If the ur doesn't exist, it searches on the disk to create it. */
 prototypes.from_file = function(file)
 {
-  if (!IO.exists(file)) {
-    Log.error(`File ${file} does not exist.`);
-    return;
-  }
-  var urpath = prototypes.file2ur(file);
+  var urpath = file;
   var path = urpath.split('.');
-  
+  if (path.length > 1 && (path.at(-1) === path.at(-2))) {
+    return prototypes.get_ur(path.at(-1));
+  }
+    
   var upperur = gameobject.ur;
+  
   if (path.length > 1) {
     var upperpath = path.slice(0,-1);
     upperur = prototypes.get_ur(upperpath.join('/'));
+    if (!upperur) {
+      Log.error(`Attempted to create an UR ${urpath}, but ${upperpath} is not a defined UR.`);
+      return undefined;
+    }
   }
 
   var newur = Object.create(upperur);
-  var script = IO.slurp(file);
+  file = file.replaceAll('.','/');
 
-  var json = {};
-  if (IO.exists(file.name() + ".json"))
-    json = JSON.parse(IO.slurp(file.name() + ".json"));
+  var jsfile = file + ".js";
+  var jsonfile = file + ".json";
+
+  var script = undefined;
+  var json = undefined;
+
+  if (IO.exists(jsfile))
+    script = IO.slurp(jsfile);
+  else {
+    jsfile = urpath + "/" + path.at(-1) + ".js";
+    if (IO.exists(jsfile)) script = IO.slurp(jsfile);
+  }
+    
+  if (IO.exists(jsonfile))
+    json = JSON.parse(IO.slurp(jsonfile));
+  else {
+    jsonfile = urpath + "/" + path.at(-1) + ".json";
+    if (IO.exists(jsonfile)) json = JSON.parse(IO.slurp(jsonfile));
+  }
+
+  if (!json && !script) {
+    Log.warn(`Could not make ur from ${file}`);
+    return undefined;
+  }
+
+  if (script)
+    compile_env(script, newur, file);
   
-  compile_env(script, newur, file);
+  json ??= {};
   Object.merge(newur,json);
 
-  file = file.replaceAll('/', '.');
-  
-  var nested_access = function(base, names) {
-    for (var i = 0; i < names.length; i++)
-      base = base[names[i]] = base[names[i]] || {};
-
-    return base;
-  };
-
   prototypes.list.push(urpath);
-  
   newur.toString = function() { return urpath; };
-  ur[urpath] = nested_access(ur,path);
-  Object.assign(ur[urpath], newur);
-  nested_access(ur,path).__proto__ = newur.__proto__;
+  ur[urpath] = newur;
 
-  return ur[path];
+  return ur[urpath];
 }
 prototypes.from_file.doc = "Create a new ur-type from a given script file.";
 prototypes.list = [];
@@ -532,7 +527,6 @@ prototypes.list_ur = function()
     var list = [];
     for (var e in obj) {
       list.push(prefix + e);
-      Log.warn("Descending into " + e);
       list.concat(list_obj(obj[e], e + "."));
     }
 
@@ -542,38 +536,43 @@ prototypes.list_ur = function()
   return list_obj(ur);
 }
 
-prototypes.file2ur(file)
+prototypes.file2ur = function(file)
 {
+  file = file.strip_ext();
   file = file.replaceAll('/','.');
-  return file.name();
+  return file;
 }
 
+/* Returns an ur, or makes it, for any given type of path
+   could be a file on a disk like ball/big.js
+   could be an ur path like ball.big
+*/
 prototypes.get_ur = function(name)
 {
-  var urpath = prototypes.file2ur(name);
-  if (!prototypes.ur[name]) {
-    if (IO.exists(name.name() + ".js")) {
-      prototypes.from_file(name.name() + ".js");
-      return prototypes.ur[name];
-    } else {
+  var urpath = name;
+  if (urpath.includes('/'))
+    urpath = prototypes.file2ur(name);
+
+  if (!prototypes.ur[urpath]) {
+    var ur = prototypes.from_file(urpath);
+    Log.warn(`tried to make ${urpath}`);
+    if (ur)
+      return ur;
+    else {
       Log.warn(`Could not find prototype using name ${name}.`);
       return undefined;
     }
   } else
-    return prototypes.ur[name];
+    return prototypes.ur[urpath];
 }
 
 prototypes.generate_ur = function(path)
 {
   var ob = IO.glob("**.js");
-  ob = ob.filter(function(str) { return !str.startsWith("scripts"); });
-
-  ob.forEach(function(name) {
-    if (name === "game.js") return;
-    if (name === "play.js") return;
-    Log.warn("generating for " + name);
-    prototypes.get_ur(name);
-  });
+  ob = ob.concat(IO.glob("**.json"));
+  ob = ob.filter(function(path) { return path !== "game.js" && path !== "play.js" });
+  ob = ob.map(function(path) { return path.set_ext(""); });
+  ob.forEach(function(name) { prototypes.get_ur(name); });
 }
 
 var ur = prototypes.ur;
diff --git a/source/engine/debug/log.c b/source/engine/debug/log.c
index f801ebe..80f0d96 100644
--- a/source/engine/debug/log.c
+++ b/source/engine/debug/log.c
@@ -63,8 +63,6 @@ void mYughLog(int category, int priority, int line, const char *file, const char
 //	  js_stacktrace();
   }
 
-  if (priority >= 2)
-    print_stacktrace();
 #endif
 }