Materials become transparent after editor restart

Hi heme3ic -

I received your message and noticed when I opened the map file (despite the SMs not being there) there was no error with the BSPs. This leads me to believe we have some erroneous data in your Project, so try going into your project folder and deleting the Intermediate, Saved and if it is there Derived Data Cache sub folders. Then open you project again, it will take a moment as it must recompile the shaders again.

Let me know if this solves your issue -

Eric Ketchum