Transformation not applied when there are multiple nodes/meshes with different skins

[janispritzkau]

As soon as I use several meshes with different skins that are parented to a transformed node, the meshes in the converted usdz file all seem to end up in the same place.

The picture below shows the issue which occurs when converting a gltf file (left side) to usdz (right side) with this tool.

Here are the gltf and usdz files where the issue happens: model.zip

[janispritzkau]

This is roughly how the nodes in gltf file are structured:

• column_base (static mesh)
• column_middle (scaled on the y axis)
• column_head_plate (translation on y axis)
• module (empty node with translation/rotation, front side)
  • module_plate_armature (empty node)
  • module_plate (mesh with skin)
  • top (joint, top part of the module plate)
  • bottom (joint, bottom part of the module plate)
  • module screws ...
• module (same as above but with different transformation, back side)

Each module plate has a seperate skin/joints. Each node in the tree is unique. Meshes are reused between modules.

[janispritzkau]

Besides that, there is a shading issue when I only have one skinned mesh in the scene.