AMD brings FSR Upscaling 4.1.2 to Vulkan. The rest of the SDK has limits
SDK 2.4 expands the API path for upscaling, while ray regeneration and radiance caching remain separate compatibility questions.
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DirectX 12 vs Vulkan: the rendering API is not a performance guarantee
Direct3D 12 and Vulkan give engines explicit control, with different platform considerations. A game's backend and its implementation matter more than the logo.