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texturesample parameter2d with a custom node

Hi,
I have followed https://wiki.unrealengine.com/Detail…E4_With_VS2017

It works great, but I also require to modify the dynamic material with a custom node.
in other words I require to edit the default texture sampling to perform my own sampler, for instance perform a blur function
s.a : https://docs.unrealengine.com/en-US/…tom/index.html

however I am not sure how to handle a texturesample parameter2d vs handling a texture object…
since the parameter already performs the sampling vs a texture object which can be sampled.

Thanks,
Z

Spiral Blur material function has an example how to do that.