If you have an issue, please, try find it in Issues or Discussions, as it might be already solved Download

Custom maps should work, but the lighting might be overly dark and unplayable performance on them may be worse.

Sun light leak fix in Questionable Ethics.

Windows, some leftover lights are removed in the furnace room in Surface Tension.

Texture improvements: retinal scanners, alien grunts sprites at the game end, health kits, vortigaunt chrome.

So some objects might not have proper shadows / be reflected in mirrors / etc, until a server actually sends them

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).

Option to forcibly disable server->client culling, but it has a great impact on the performance.

Frame limiters are uncapped by default ( vid_displayfrequency, sleeptime) thanks to a1batross.

Unzip BOTH hl1-rt.zip AND hl1-rt-resources.zip into the folder

Modifying texture properties (PBR, water, mirrors etc).

Converting a map to be compatible with RT.

Mods that just replace models or add maps should work, but the lighting might be overly dark and unplayable. If you have an issue, please, try find it in Issues or Discussions, as it might be already solved Mods If you would like to discuss, go to Discussions The previous unpatched version is still available as hl1-rt-combined-previous.zip.

If you experience problems with weird green lighting spilling everywhere / having reddish shadows, hl1-rt-patched.zip contains patched shaders for the latest drivers.

Green / Red light fix for the latest drivers

Classic renderer's decals don't have lightmap lighting.

Classic renderer doesn't support sky visibility polygons, so some unintended objects might be observed in a skybox.

Classic renderer doesn't support dynamic lightmaps (consequently, a flashlight).AMD GPUs might have some incompatibility issues.Place it into the rt_bin folder, ensure that it's called nvngx_dlss.dll.Replace the original rt_bin/RayTracedGL1.dll with a new one bin/RayTracedGL1.dll from RayTracedGL1-Bundle-DLSS.zip.To use DLSS, additional steps are required (see below).

Replace if prompted: so original configs will not interfere with HL1 RT.If you have a previous version of the mod, delete existing rt and rt_bin folders.In Steam library: right click on Half Life → Manage → Browse local Files.A clean installation without any mods is preferable.Buy and install Half-Life (1998) on Steam

Downloading Half-Life