You must use a compatible PBR Resource Pack (like LabPBR) to see the full "raytraced" effect on textures.
The support for volumetric fog and light shafts (god rays) significantly enhances the "mood" of vanilla Minecraft. Vanilla Raytracing for Java! (Support 3D Models)
Requires Iris Shaders or Optifine . It may conflict with other "core shaders" that modify the same rendering pipelines. Setup and Requirements You must use a compatible PBR Resource Pack