Substance .sbsar support is missing key features (image input and non square resolution)


We have developed a tool that allow our client to input their design, configure various aspects of their embossing techniques and preview it on various models.
The tool was built with Unreal engine. The main asset of the tool is a custom built substance tailored to their needs.

We are now studying the possibility to shift this development to Omniverse.
Unfortunately, our first test indicate that some key features are missing from the current substance .sbsar integration :

  • No Image input support. this is required by our substance to serve it’s function, as it is at its core, an image driven generation.
  • No support for non square outputs Substance allows individual output size for width and height. (the substance output size we use and require is 4096X8192).

What are my option at this stage ?
Is this the appropriate forum to formulate requests regarding the current sbsar integration limitations ?
Would the current state of the kit allow me to build a better integration from scratch ?

Thanks in advance.