MDL : code generation for nodegraph with multiple surfaceshader output son a creates invalid code

[bernardkwok]

A functional nodegraph for a nodedef with multiple surfaceshader outputs creates a procedure with a struct of multiple materials in MDL. This is considered to be invalid. (Tested with mdlc). For the same graph which is not an implementation a single material is evaluated and does not encounter this issue.

Example failing input file:

transparency_nodedef_test.mtlx.txt

Generated code:

ss_opacity_mapped_out.genmdl.mdl.txt

Error file:

ss_opacity_mapped_out.genmdl.mdl_compile_errors.txt

Namely the errors are:

• Error C240: structure fields of type 'material' are forbidden
• Error C207: variables of type 'material' are forbidden

Passing file:
transparency_test.mtlx.txt