5.4.3 assetbundles broken in 5.6.2

Unity Engine
1

Hi all, our team had been using Unity 5.4.3 for quite a long while already, and wanted to upgrade our Unity version to 5.6.2 to enjoy the fun from Apple ARKit.

Our game consists of few thousand assetbundles built in 5.4.3, each assetbundle contains a Prefab or a Scene that users can browse and download in our game. We realize that if we build the game using Unity 5.6.2, the 5.4.3 assetbundles shown in the 5.6.2 game will become broken with pink textures (for both prefabs and scenes) and the mesh scale and position of the objects in the scenes are all messed up.

I had searched for a long time and came across this thread:

and this thread:

and realize we might have to build all the assetbundles again in Unity 5.6.2. Our game is currently supporting 3 platforms, namely Android, iOS and PC, so that means we would need to rebuild everything for all 3 platforms and put a whole new batch of bundles on our server in order to support the old and new app if we would upgrade Unity to 5.6.2. Users will need to re-download all assetbundles as well.

Anyone have experienced the same issue? We are trying to look for an easier solution. Thank you in advance for any suggestions!

2

I would be very surprised if there is a different solution than rebuilding all asset bundles with the proper Unity version.

Unity Technologies made significant changes to texture (importing) in 5.5, which most likely caused the internal data structure to change.

3

Thanks Peter, I guess I should start writing myself a tool to automate the whole process.

4

This it what really puts me off assetbundles.