Materials lost when transform a SnapshotDb to another by using core-transform

[fatalstar]

Describe the bug
I try to transform a SnapshotDb to another, but materials lost.
And then, I try to transform it to an empty SnapshotDb，materials get lost and error.

To Reproduce
Steps to reproduce the behavior:

1. Convert House_Model.dgn to a local house.bim file. And do same thing with testY1.dgn.
2. Build an iModelTransformer with core-transformer@3.4.4
3. Excute iModelTransformer.processAll( house.bim, testY1.bim, no options),
4. When transform done, excute targetDb.saveChanges( )
5. Open the targetDb in view, and could see the materials lost.

Expected behavior
Materials exist and be correct.

Screenshots
The house.bim view :

The result.bim view: (materials get lost)

If transform to an empty db, and view: (roof material lost, wall and steps meterial error)

Desktop (please complete the applicable information):

• iTwin.js Version [3.4.4]

Additional context

[pmconne]

Did you try with the latest version (3.6)?
@MichaelBelousov

[fatalstar]

Did you try with the latest version (3.6)? @MichaelBelousov

I have tested core-transformer@3.6.3 just now and materials still get lost.

[MichaelBelousov]

@fatalstar I'm sorry for missing this. The transformer has moved to a separate repository, so I will make an issue there and close this one if that's OK. Texture loss should have been fixed by #5059.

[fatalstar]

@fatalstar I'm sorry for missing this. The transformer has moved to a separate repository, so I will make an issue there and close this one if that's OK. Texture loss should have been fixed by #5059.

Sure, thanks for that!