The trailer dropped literally a couple hours ago! Go check it out here:    • Half-Life 2 RTX, An RTX Remix Project...  

Thank you to Orbifold Studios for making this! This is the most excited I' and probably most of the Half-Life community has been in a while! :)

The following sentences are copied from the original videos description:
Half-Life 2 RTX: An RTX Remix Project is early in development and is a community effort looking to galvanize talented modders and artists everywhere. If you are interested in joining the project, and have significant experience with creating mods or 3D art, we encourage you to apply via the Half-Life 2 RTX: An RTX Remix Project website: http://www.hl2rtx.com/