Falck
AMD Vanguard participant
So a modder did a HL1 Ray Tracing mod. Haven't tested it myself, and rumors has it it's only been developed using nVidia HW, so nothing on performance om AMD Ray Accelerators.
https://youtube.com/watch?v=LQCZTxzW6A0
https://github.com/sultim-t/xash-rt/releases
https://youtube.com/watch?v=LQCZTxzW6A0
https://github.com/sultim-t/xash-rt/releases