Valve just released a free Destinations VR creation tool and it was built with Valve's Source 2 engine. It is important to note that this is early access software and it will continue to develop as time goes on.
The Destinations workshop page on Steam notes, “Early Access is a great way to get our community involved. While we continue to build out the features and worlds of Destinations, we are releasing a set of creation tools, sample worlds, and documentation for the creators of our community.”
Valve's Destinations Workshop Tools let you create, share, and explore both real and imaginary places in virtual reality. Users can create interactive worlds and share them on the Destinations Workshop. Workshop Tools include Several example Destinations created with photogrammetry, an example map that users can copy and modify, and the Destinations Viewer, where users can browse and explore Destinations downloaded from the Steam Workshop.
This release comes on the heels of the Valve’s update to the free game The Lab’s. The update added many enhancements to the mini-games and a brand new global scoreboard. Many of the available environments in the Destinations Workshop Tools are from The Lab's Postcards mini-game.
So far reviews for the workshop have been positive. One Steam user said, “Pretty cool demo of what this scenery VR/3D workshop tool can do” while another admitted, “In love with this program, honestly.”
Destinations supports both motion-tracked controllers and x-input controllers. It works with all headsets supported by OpenVR. The system requirements are Windows 7 SP1, Windows 8.1 or Windows 10, Intel i5-4590, AMD FX 8350 equivalent or better, 4 GB RAM, NVIDIA GeForce GTX 970, AMD Radeon R9 290 equivalent or better, and a HDMI 1.4, DisplayPort 1.2 or newer.
You can download the Workshop here. Once downloaded, you will see the Destinations Workshop Tools in your Library under Tools. You can also learn more at the Destinations and Source 2 Level Editor Wiki’s.