AnKi has had ray-tracing support for quite some time. Beyond managing acceleration structures, the engine uses VK_KHR_ray_tracing_pipeline/DXR 1.0 for shadows (soon deprecated), indirect diffuse, and indirect specular. Upon initialization, the engine reads pre-compiled shader binary blobs and creates ray-tracing pipelines containing a number of ray-generation shaders, one or more miss shaders, and several hit shaders. Currently, two RT libraries are built: one for RT shadows and one for indirect RT. When the engine loads materials, the materials select the appropriate hit shaders, which are then forwarded to the shader binding table during rendering. This approach works well, as materials have the flexibility to choose different RT shaders, just as they choose different combinations of vertex and pixel shaders.
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