Ah turns out I was using the wrong node, I should have been using 'Height to Normal Blend'. If anyone else comes across this issue hopefully this answer will help.
For the normal node, I have found that you need to crank up the intensity for it to show. However with a linear gradient, it should show as a solid coloured normal because it is denoting a constant angle. I also see you are blending a flat normal with the result of the normal node to get rid of the alpha, a cleaner…
Hey guys, I only started using Substance recently and came across something that is confusing me. In this little test I have created a 'Gradient Linear' to simulate the input of an angled 'Height Map'. I would expect this to create a gradient normal map. But its coming through flat... Anyone got any ideas?