The color is defined in the edge blend node in Poser. Octane does not have that type of node.
Easiest thing to do here, is to bring the red color back and then afterwards adjust if you wan to.
What you need to do in the plugin is
- copy the diffuse node to the clipboard (right click, copy Image)
- change the diffuse type to multiply
- now paste back the image in texture1
- now change texture2 to RGBSpectrum and set the color to the same as one of the colors in the edge blend node in Poser (the red colors). You can do that easily by clicking on the color itself, then choose Pick color and then select the color in the poser material by moving the mouse over that color, then press space to lock the color and then press OK
Now you have something similar to what you have in Poser
Next thing to do is to play with the specular settings (change color and roughness) to match the output of the poser render. This really depends on the actual poser nodes.
Hope this helps
Configuration: Windows 10 64bit Creators Edition, I7 6850K, 128GB, 2 GeForce 1080ti, P11 Pro SR6