MDL SDK 2020.1.1 (334300.4226): 29 Sep 2020

ABI compatible with the MDL SDK 2020.1.1 (334300.4226) binary release
(see https://developer.nvidia.com/mdl-sdk)

Added and Changed Features

• General

  • Thumbnail paths are now resolved when they are requested. Before, the resolving was done
    during the module loading.
  • A new backend option eval_dag_ternary_strictly has been added, which enables strict
    evaluation of ternary operators (?:) on the DAG to reduce code size. By default it is enabled.

• MDL Compiler and Backends

  • Added single-init mode for a set of functions added to a link unit, allowing all these
    functions to reuse values calculated in the init function and stored in the texture results
    field of the state struct. To enable this mode, the first path in the target function
    description list given to ILink_unit::add_material() must be "init". (Note: the init
    function will not be marked as ITarget_code::DK_BSDF anymore.)

• MDL SDK examples

  • Examples Shared

    • Enabled CMake option for linking MSVC dynamic runtime (/MD) instead of static (/MT) by
      default.

  • Example Code Generation

    • Updated MaterialX support to incorporate latest changes from the MaterialX github
      repository (branch 1.3.8).

  • Example DXR

    • Added -e option to specify which expressions to compile.

Fixed Bugs

• MDL Compiler and Backends

  • Fixed IFunction_call::get_arguments() for the array constructor, such that it always
    uses "0", "1", and so on as argument names.
  • Fixed failing MDLE export if the tex::gamma_mode type is only referenced by an
    annotation.
  • Fixed storing matrices in texture results taking up all the space without much benefit.