Fix Exponential Fog

For some reason, SetDefExp2 type fog doesn't seem to work upon export, but regular SetDefExp does. This is just a proposed minor change to use the regular SetDefExp option if fixing the other is too big a task.

korman/exporter/manager.py

@@ -321,8 +321,8 @@ 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":
+                elif fni.fog_method == "exp":
-                    stream.writeLine("Graphics.Renderer.Fog.SetDefExp2 {} {}".format(fni.fog_end, fni.fog_density))
+                    stream.writeLine("Graphics.Renderer.Fog.SetDefExp {} {}".format(fni.fog_end, fni.fog_density))
 
     def _write_pages(self):
         age_name = self._age_info.name

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",