10 October 2018 Update (Version 1809) Includes WDDM 2.5. Updates to Display driver development in Windows 10, version 1809 include the following features: Shader Model 6.3, adding support for DirectX12 Raytracing (DXR). Raytracing, in order to support hardware-accelerated raytracing in Direct3D 12. Universal Driver Requirements, drivers will need to ensure their DirectX 11 and DirectX12 user-mode drivers and kernel mode drivers, as well other DLL loaded by these components, adhere to the Universal API. SRV-Only Tiled Resource Tier 3, a new capability bit for tiled resources, exposing sparse volume textures without requiring unordered-access and render-target operations support. Render Pass, introducing render pass concept in Direct3D 12, adding new APIs to be run on existing drivers and allow user mode drivers to choose optimal rendering path without heavy CPU penalty. Meta-commands, adding preview support for DirectML, a high-performance, hardware-accelerated DirectX 12 library for machine learning. With Windows 10 version 1903 and newer meta-commands and DirectML are a stable part of Windows. HDR Brightness Compensation, a new SDR brightness boost, raising the reference white of SDR content to the user-desired value, allowing SDR content to be reproduced to a typical 200-240 nits. It also allows reporting if the hardware/driver supports HDR output through FP16 pixel format or only ARGB10 pixel format. SDR White Level, to let the graphics drivers know the SDR white level value that is being applied by the OS compositor for all the SDR content, for a display which is running in HDR mode. Display Synchronization, allowing the operating system to check for display synchronization capabilities if the display is exposed by the driver and prior to enabling the display. Tracked Workloads was also added as an experimental feature to better control the trade-off between quicker processor execution and lower power consumption, but was removed from Windows 10 version 2004 and deprecated from earlier OS versions as part of a security fix. WDDM 2.6 Windows 10 May 2019 Update (Version 1903) includes WDDM 2.6. Updates to display driver development in Windows 10 version 1903 include the following features: Shader Model 6.4, adding support low-precision packed dot product intrinsics and for library sub-objects to simplify ray-tracing. Super Wet Ink, allowing the creation of textures in formats and modes the IHVs doesn't natively support, resolving them as a resource projection to a format the hardware/drivers natively support, allowing internal drivers optimizations. Variable Rate Shading, also known as coarse pixel shading, a