Fix T50045: FBX Export Scale (global_scale) is applied twice.

Do not store export scaling, this is internal runtime data specific to
exporter, it’s applied already in objetcs' matrices, and has nothing to
do with actual FBX global scaling.

1 files changed, 4 insertions, 2 deletions

diff --git a/io_scene_fbx/export_fbx_bin.py b/io_scene_fbx/export_fbx_bin.py
index 49e8e160..36e8ea10 100644
--- a/io_scene_fbx/export_fbx_bin.py
+++ b/io_scene_fbx/export_fbx_bin.py
@@ -2672,13 +2672,15 @@ def fbx_header_elements(root, scene_data, time=None):
 
     props = elem_properties(global_settings)
     up_axis, front_axis, coord_axis = RIGHT_HAND_AXES[scene_data.settings.to_axes]
+    # DO NOT take into account global scale here! That setting is applied to object transformations during export
+    # (in other words, this is pure blender-exporter feature, and has nothing to do with FBX data).
     if scene_data.settings.apply_unit_scale:
         # Unit scaling is applied to objects' scale, so our unit is effectively FBX one (centimeter).
         scale_factor_org = 1.0
-        scale_factor = scene_data.settings.global_scale / units_blender_to_fbx_factor(scene)
+        scale_factor = 1.0 / units_blender_to_fbx_factor(scene)
     else:
         scale_factor_org = units_blender_to_fbx_factor(scene)
-        scale_factor = scene_data.settings.global_scale * units_blender_to_fbx_factor(scene)
+        scale_factor = scale_factor_org
     elem_props_set(props, "p_integer", b"UpAxis", up_axis[0])
     elem_props_set(props, "p_integer", b"UpAxisSign", up_axis[1])
     elem_props_set(props, "p_integer", b"FrontAxis", front_axis[0])