I've has this issue as well. I've tried many driver versions with someone else and we could not find a driver that worked. The game worked around 4-5 months ago, but does not work anymore. All models that contain the shader go invisible after around 20-30 seconds of play variaing sometimes to 30 minutes before they go invisible. Shadows still cast on models, if there's a dynamic light. I can attach screenshots when I get home.
I have the same problem.
you can see what say the people. The creators of the shader work in this problem, but if AMD can solution this, i really appreciate.
I buy the RX480 graphic card and HTC vive only for play VRchat