collada: change image export: export either UV Textures or Materials. This

avoids wrong texture data when multiple objects are exported. Note: This
commit might possiblyt not work fully. The full feature is added with the
next commit)

release/scripts/presets/operator/wm.collada_export/sl_plus_open_sim_rigged.py

@@ -10,7 +10,7 @@ op.include_armatures = True
 op.include_shapekeys = False
 op.deform_bones_only = True
 op.active_uv_only = True
-op.include_uv_textures = True
+op.export_texture_type_selection = 'uv'
 op.use_texture_copies = True
 op.triangulate = True
 op.use_object_instantiation = False

release/scripts/presets/operator/wm.collada_export/sl_plus_open_sim_static.py

@@ -10,7 +10,7 @@ op.include_armatures = False
 op.include_shapekeys = False
 op.deform_bones_only = False
 op.active_uv_only = True
-op.include_uv_textures = True
+op.export_texture_type_selection = 'uv'
 op.use_texture_copies = True
 op.triangulate = True
 op.use_object_instantiation = False