To answer my own question… yes…
Here is my ‘test’ material that is the base material class…
Of course things set to parameters, then in the instance you can mess with the B channel of that 3vector, and change the strength of the normal as well… here is B set at 1.0
ok, now the forum will not let me upload the other images… but 1.0 setting is normal of course, go lower to make it ‘stronger’… higher to make it ‘weaker’…