diff --git a/psychoblend/assembly.py b/psychoblend/assembly.py
index b4369c4..8d5c9fd 100644
--- a/psychoblend/assembly.py
+++ b/psychoblend/assembly.py
@@ -230,7 +230,7 @@ class RectLamp:
     def take_sample(self, render_engine, scene, time):
         render_engine.update_stats("", "Psychopath: Collecting '{}' at time {}".format(self.ob.name, time))
         self.time_col += [self.ob.data.color * self.ob.data.energy]
-        if ob.data.shape == 'RECTANGLE':
+        if self.ob.data.shape == 'RECTANGLE':
             self.time_dim += [(self.ob.data.size, self.ob.data.size_y)]
         else:
             self.time_dim += [(self.ob.data.size, self.ob.data.size)]
diff --git a/psychoblend/psy_export.py b/psychoblend/psy_export.py
index cfa4546..c6a9007 100644
--- a/psychoblend/psy_export.py
+++ b/psychoblend/psy_export.py
@@ -152,7 +152,7 @@ class PsychoExporter:
             self.w.indent();
             self.w.write("Type [Color]\n")
             self.w.write("Color [%f %f %f]\n" % (world.horizon_color[0], world.horizon_color[1], world.horizon_color[2]))
-            self.w.unindent();
+            self.w.unindent()
             self.w.write("}\n")
 
         # Infinite light sources
diff --git a/psychoblend/render.py b/psychoblend/render.py
index 895ea2f..57bef54 100644
--- a/psychoblend/render.py
+++ b/psychoblend/render.py
@@ -90,7 +90,7 @@ class PsychopathRender(bpy.types.RenderEngine):
         try:
             self._render(scene)
         except:
-            if self.process != None:
+            if self._process != None:
                 self._process.terminate()
             raise