What happened with textures and rendering in 4.9?

Hello,

I’m sorry to report that the problem seems still present.

I tried some of the infinity blade new packages, on the left, the frost giant in a new 4.9 project, on the right, the same in my project:

I have emptied the cache directory entirely several times.

When i do so, everything is fine the first time i open a skeletal mesh, but the second time (even if i open a different skeletal mesh from the IB warriors collection), the problem is back.

This happens only with the IB warriors collection, and in case this helps, i have reassigned them the UE4 mannequin skeleton from the anim starter pack.

Do you think any shader corruption could come from a change of skeleton ?

Thanks

Cedric