MDL SDK 2021.1.1 (349500.8264): 18 Mar 2022

ABI compatible with the MDL SDK 2021.1.1 (349500.8264) binary release
(see https://developer.nvidia.com/mdl-sdk)

Known Issues

• The version text in the MI_NEURAYLIB_PRODUCT_VERSION_STRING macro
  in the version.h include file contains the previous version number
  of "2021.1" instead of "2021.1.1".

Added and Changed Features

• Image File Format Plugins

  • Support .rgb extension for textures in the SGI file format.

Fixed Bugs

• General

  • Fixed filename extension mismatch when exporting textures referenced from MDL modules.
    Under certain circumstances, the texture was copied, but got a different filename extension,
    causing problems importing the MDL module again.
  • Fixed creation of function calls of the cast operator if the target type has frequency
    qualifiers. Similarly, fixed creation of function calls of the ternary operator if the
    argument types have frequency qualifiers.
  • Fixed handling of memory allocation failures in IImage_api::create_canvas()/create_tile()
    methods.
  • Also encode the simple name of function definitions. For almost all functions this does not
    make any change since the simple name is usually an identifier, except for a couple of
    operators from the builtins module.

• MDL Compiler and Backends

  • libbsdf: Fixed incorrect child normal orientation usage in df::(color_)fresnel_layer,
    df::(color_)custom_curve_layer and df::(color_)measured_curve_layer for backside hits.
  • HLSL backend: Fixed code generation for scene data access functions inside automatically
    derived expressions.