MDL SDK 2023.0.2 (367100.3997): 01 Aug 2023

ABI compatible with the MDL SDK 2023.0.2 (367100.3997) binary release
(see https://developer.nvidia.com/mdl-sdk)

Added and Changed Features

• General
  • Improved installation instructions (mention VCPKG_PLATFORM_TOOLSET for
    Windows, add 7.5 as the currently highest supported OptiX version).

Fixed Bugs

• General

  • Fixed export of uvtile textures referenced in MDL modules.
  • Improved installation instructions for installation of thirdparty dependencies via
    apt-get.
  • Fixed wrong reference counts when cloning instances of IPointer and
    IConst_pointer via IFactory::clone() without using the option
    DEEP_ASSIGNMENT_OR_CLONE.

• MDL Compiler and Backends

  • All backends: Fixed code generation for material expressions with path prefix
    "geometry.normal".
  • Any unsupported code in GLSL/HLSL code generation will now issue an "Internal JIT backend"
    error. The <ERROR> marker in the generated source will remain.
  • Fixed GLSL alias type definitions inside the GLSL backend
    (no more "missing conversion constructor" errors).
  • Module transformer: Fixed missing constant declarations when used in some annotations
    in non-root modules that are inlined.
  • Module transformer: Do not loose anno::native() annotations when inlining a module.
  • Fixed MDL compiler options containing double typed values
    (causing wrong limits::DOUBLE_M[IN|AX]).
  • Fixed the necessary precision to print floats and doubles so it can read back
    without losses.
  • Fixed missing elemental constructor for locally defined structs in the DAG- representation.
  • Fixed compiler crashes for:
    • Invalid call expressions.
    • Invalid array types with a let expression as the array size.
  • Compiler now reports proper errors when a function is returned from a function.
  • Fixed PTX code generation that causes a GPU crash when the load/store instructions
    are generated with a wrong address space.
  • Fixed HLSL/GLSL backends generating float constants with not enough precision.
    In particular, the ::limits::MIN_FLOAT constant was generated wrong,
    causing rounding to zero later.

• MDL Distiller and Baker

  • Fixed bug in command line mdl_distiller MDL printer for ::tex module imports
    when textures are used in material parameter defaults.
  • Fixed mixer normalization in mdltlc for patterns with attributes.