A proper fix for the X-axis flipping.

export_geo.py

@@ -3,6 +3,7 @@ from .geomesh import *
 from .bones import *
 import bpy.path
 import bpy
+import mathutils
 
 from bpy_extras.io_utils import axis_conversion
 
@@ -111,8 +112,13 @@ def save(operator, context, scale = 1.0, filepath = "", global_matrix = None, us
     body_name = bpy.path.display_name_from_filepath(filepath)
     geo.setName(body_name)
 
-    axis_rotation = axis_conversion('-Y', 'Z', 'Z', 'Y')
+    #axis_rotation = axis_conversion('-Y', 'Z', 'Z', 'Y')
     #axis_rotation = axis_conversion('Y', 'Z', '-Z', 'Y')
+    axis_rotation = mathutils.Matrix([
+        [-1, 0, 0],
+        [0, 0, -1],
+        [0, 1, 0],
+    ])
     axis_rotation.resize_4x4()
 
     print("scale: %s" % (scale, ))
@@ -152,7 +158,7 @@ def save(operator, context, scale = 1.0, filepath = "", global_matrix = None, us
 
         convert_mesh(geo_model, mesh, ob)
 
-    if True: #flip bones
+    if False: #flip bones
         for i in range(len(geo.models) - 1, -1, -1):
             name = geo.models[i].name.decode("utf-8")
             #if reg_exp.search(name) is not None: