Hi Fabian,
ok, now I understand how to set it up. Why is this so complicated!? Is this really so rarely used? (Or is it just me being quite new to substance painter?

)
I think I have a bug to report in relation to this: When I create a substance in designer and define a usage in "integration attributes", I can then not plug the input in another node afterwards. I have to remove the usage, plug the node in and then redefine the usage. When the input node is already plugged in somewhere, its usage can be changed without a problem. Is there a place to submit bugs somewhere?