diff --git a/korman/exporter/manager.py b/korman/exporter/manager.py
index 859420a..2599673 100644
--- a/korman/exporter/manager.py
+++ b/korman/exporter/manager.py
@@ -329,8 +329,8 @@ class ExportManager:
                 stream.writeLine("Graphics.Renderer.Fog.SetDefColor {} {} {}".format(*fni.fog_color))
                 if fni.fog_method == "linear":
                     stream.writeLine("Graphics.Renderer.Fog.SetDefLinear {} {} {}".format(fni.fog_start, fni.fog_end, fni.fog_density))
-                elif fni.fog_method == "exp2":
-                    stream.writeLine("Graphics.Renderer.Fog.SetDefExp2 {} {}".format(fni.fog_end, fni.fog_density))
+                elif fni.fog_method == "exp":
+                    stream.writeLine("Graphics.Renderer.Fog.SetDefExp {} {}".format(fni.fog_end, fni.fog_density))
 
     def _write_pages(self):
         age_name = self._age_info.name
diff --git a/korman/properties/prop_world.py b/korman/properties/prop_world.py
index 1e159a5..453f2d9 100644
--- a/korman/properties/prop_world.py
+++ b/korman/properties/prop_world.py
@@ -31,7 +31,7 @@ class PlasmaFni(bpy.types.PropertyGroup):
     fog_method = EnumProperty(name="Fog Type",
                               items=[
                                      ("linear", "Linear", "Linear Fog"),
-                                     ("exp2", "Exponential", "Exponential Fog"),
+                                     ("exp", "Exponential", "Exponential Fog"),
                                      ("none", "None", "Use fog from the previous age")
                                     ])
     fog_start = FloatProperty(name="Start",
diff --git a/korman/ui/ui_world.py b/korman/ui/ui_world.py
index 5443248..c4bcb8c 100644
--- a/korman/ui/ui_world.py
+++ b/korman/ui/ui_world.py
@@ -262,6 +262,10 @@ class PlasmaEnvironmentPanel(AgeButtonsPanel, bpy.types.Panel):
         layout = self.layout
         fni = context.world.plasma_fni
 
+        # warn about reversed linear fog values
+        if fni.fog_method == "linear" and fni.fog_start >= fni.fog_end and (fni.fog_start + fni.fog_end) != 0:
+            layout.label(text="Fog Start Value should be less than the End Value", icon="ERROR")
+
         # basic colors
         split = layout.split()
         col = split.column()