PARAMETER SETTING TIP!
The principled shader in Houdini is pretty convenient because it already contains fields that allow you to browse for the texture files right away. However, one thing you need to do is set the parameter you’re reading in to 1. For example, if I read a roughness map, the ‘roughness’ value on the shader will multiply against the texture map values, and on the shader, you’ll need this to be 1. This also provides a convenient way to multiply the texture map values if you need to.