Sampler exporting empty painter materials ??

I brought in textures files into sampler and expected to be able to export a painter material.  What I got was a material with just a normal channel.  The files I used are a color map, height, and roughness.  I tried with importing PNG and TGA. I get the same result on export.

As you see I have color, normal, height, and roughness selected as export in painter format.

When I open it in painter I get:

a material with just a normal channel ???