See attached video for example.  I'm trying to use the 3d paths tool because it's a better workflow, but it's now working for me.  My maps are baked at 4096 x 4096.

I created a paint layer then clicked on the stitches complex since I'm trying to create an overlock stitch.

When I click the pin tool the stitch disappears from the properties panel.

I created the path but there is no path just a white blured line.  I tried this many times but it didn't work right.

I used the adobe official videos titled: 

Creating 3D Paths in Substance 3D Painter and

Introducing the 3D Path Tool Presets 

what am I missing.  I tried to upload a video but it kept saying it was private when it isn't private.