Half-Life 1: Ray Traced 1.0.5a

Xash3D: Ray Traced is a fork of the Xash3D FWGS engine with the added custom path-traced renderer.

Install

1. Buy and install Half-Life (1998) on Steam

   • A clean installation without any mods is preferable
   • It doesn't work with Half-Life: Source

2. Open its folder

   • In Steam library: right click on Half Life → Manage → Browse local Files

3. Unzip hl1-rt-1.0.5.zip AND hl1-rt-resources-1.0.5.zip (for vertsion 1.0.5a download only hl1-rt-combined-1.0.5a.zip ) into the folder

   • If you have a previous version of the mod, delete existing rt and rt_bin folders
   • Replace if prompted: so original configs will not interfere with HL1 RT

4. Run rt_bin/xash3d.exe from its folder

   • Press X to switch renderers on the fly
   • To use DLSS, additional steps are required (see below)

Optional DLSS

1. Download RayTracedGL1-Bundle-DLSS.zip
   • Replace the original rt_bin/RayTracedGL1.dll with a new one bin/RayTracedGL1.dll from RayTracedGL1-Bundle-DLSS.zip
2. And download nvngx_dlss.dll
   • Place it into the rt_bin folder, ensure that it's called nvngx_dlss.dll

Update log

• Vsync option should work correctly now
  • Frame limiters are uncapped by default (vid_displayfrequency, sleeptime) thanks to a1batross
• Option to forcibly disable server->client culling, but it has a great impact on the performance
  • Problem description: Part of the objects are culled by a server before sending packets to a client (and in HL1, even in singleplayer, a local server is created). So some objects might not have proper shadows / be reflected in mirrors / etc, until a server actually sends them
• Texture improvements: retinal scanners, alien grunts sprites at the game end, health kits, vortigaunt chrome
• Missing crossbow crosshair is restored
• Windows, some leftover lights are removed in the furnace room in Surface Tension
• Sun light leak fix in Questionable Ethics
• Incorrect sun halo fix
• Option to disable lens dirt

Known issues

• AMD GPUs might have some incompatibility issues
• Classic renderer doesn't support dynamic lightmaps (consequently, a flashlight)
• Classic renderer doesn't support sky visibility polygons, so some unintended objects might be observed in a skybox
• Classic renderer's decals don't have lightmap lighting
• Custom maps should work, but the lighting might be overly dark and unplayable; performance on them may be worse
• Hazard Course is not supported yet

If you would like to discuss, go to Discussions