glTF exporter: fix buffer size with Draco compression

io_scene_gltf2/__init__.py

@@ -15,7 +15,7 @@
 bl_info = {
     'name': 'glTF 2.0 format',
     'author': 'Julien Duroure, Norbert Nopper, Urs Hanselmann, Moritz Becher, Benjamin Schmithüsen, Jim Eckerlein, and many external contributors',
-    "version": (1, 1, 3),
+    "version": (1, 1, 4),
     'blender': (2, 81, 6),
     'location': 'File > Import-Export',
     'description': 'Import-Export as glTF 2.0',

io_scene_gltf2/io/exp/gltf2_io_draco_compression_extension.py

@@ -249,6 +249,13 @@ def __compress_primitive(primitive, dll, export_settings):
 
         primitive.extensions['KHR_draco_mesh_compression'] = extension
 
+        # Remove buffer views from the accessors of the attributes which compressed.
+        attributes['POSITION'].buffer_view = None
+        if enable_normals:
+            attributes['NORMAL'].buffer_view = None
+        for tex_coord in tex_coord_attrs:
+            tex_coord.buffer_view = None
+
         # Set to triangle list mode.
         primitive.mode = 4