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=== Ray tracing shaders === [[Ray tracing (graphics)|Ray tracing]] shaders are supported by [[Microsoft]] via [[DirectX Raytracing]], by [[Khronos Group]] via [[Vulkan (API)|Vulkan]], [[GLSL]], and [[SPIR-V]],<ref>{{cite web |url=https://www.khronos.org/blog/vulkan-ray-tracing-final-specification-release |title=Vulkan Ray Tracing Final Specification Release |date=2020-11-23 |df=mdy |department=Blog |website=[[Khronos Group]] |access-date=2021-02-22}}</ref> by [[Apple Inc.|Apple]] via [[Metal (API)|Metal]]. [[NVIDIA]] and [[AMD]] called "ray tracing shaders" as "ray tracing cores". Unlike unified shader, one ray tracing shader can contains multiple ALUs.<ref>{{Cite web| title=RTSL: a Ray Tracing Shading Language | url=https://graphics.stanford.edu/~boulos/papers/rtsl.pdf | archive-url=https://web.archive.org/web/20111012221101/http://graphics.stanford.edu/~boulos/papers/rtsl.pdf | archive-date=2011-10-12}}</ref>
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