NVIDIA/MDL-SDK 2025.0.3

MDL SDK 2025.0.3 (387700.2665)

Repository: NVIDIA/MDL-SDK

Tag: 2025.0.3

Published: 2025-12-18T12:58:39Z

Prerelease: no

Release notes: ABI compatible with the MDL SDK 2025.0.3 (387700.2665) binary release (see https://developer.nvidia.com/mdl-sdk)

Added and Changed Features

• General
• Improved database garbage collection such that transactions in unrelated scopes

do not prevent a cleanup.

• The recommended vcpkg version has been updated to git ID 30d7c16. This

update includes Boost 1.89.0, OpenImageIO 3.0.9.1, Vulkan SDK 1.4.309.0, and various security fixes in their dependencies.

• The recommended MaterialX version has been updated to 1.39.4.

• Reduced compiler warnings on Windows.

• MDL Compiler and Backends
• Added compilation-context option "rerun_inlining" (off by default) to re-run inlining

at material compilation time. This might be beneficial in instance compilation mode to inline (and fold) much more code, so analysis on code structure will find more properties.

• MDL SDK examples
• Multiple examples:
• Harmonized the name of some command-line options ("--camera" instead of

"--cam", "--no_window" instead of "--nogl", "--nogui", or "--nowin").

• Renamed environment variable MDL_SAMPLES_ROOT to MDL_EXAMPLES_ROOT.
• Added support for moving example binaries within the install directory,

e.g., to support the vcpkg layout.

• Example df_vulkan:
• Added focal point to "--camera" command-line option.
• Added "--fatal", "--error", etc. command-line options to control the verbosity.
• Added support to generate MDL code from MaterialX files.
• Added support to use df_vulkan as test renderer for the MDL backend in MaterialX.
• Use the image export option "force_default_gamma" for easier comparison

with other backends in MaterialX.

• Example DXR:
• Added options to disable default MDL and MaterialX search paths for improving the export

of generated MDL from MaterialX for debugging purposes.

• The example now uses the static MSVC runtime (as all other examples). As

a consequence, the pre-built MaterialX libraries from their homepage are no longer directly suitable. See also the documentation of the CMake variable MDL_MSVC_DYNAMIC_RUNTIME.

• Dropped "autodesk_" prefix from build/install location for MaterialX support files.
• Replaced command-line options "-g" and "--generated" by "--dump_mdl".

• Example distilling_unity:
• Replaced command-line option "--verbosity" by "--fatal", "--error", etc.

Fixed Bugs

• General
• Fixed a problem when Ninja is used as CMake generator on Windows.

• Removed a few calls to strlen() to please static scanners.

• MDL Compiler and Backends
• Fixed position of token for qualified names starting with "::" and prefix operators

taken from the second token. This could lead to wrong error lines if for instance the "++" operator and its operand are on different lines.

• MDL SDK examples
• Example DXR:
• Fixed endless loop for existing files when using "--mdl_dump".

File names don't get an increasing suffix anymore.

• MDL Distiller and Baker
• Improved distilling of OpenPBR materials with metalness = 1.