With the new PBR capabilities of Character Creator 2.0 Beta, there are some steps to follow in order to convert CC 1.5x assets to bring inline with the new PBR shading system.  

• Convert to PBR Skin
• Convert to PBR Outfits and Accessories

Convert to PBR Skin

For CC 2.0 (Official Version) PBR enabled Appearance Editor and this Beta Version release, you can derive PBR textures from a classic set of textures by using the following methods:

• Method 1: You apply the Skin presets directly from Content Manager > Embedded > Base character (Male & Female).

• Method 2: Another method is to use the Roughness textures included for Male and Female and apply them to the character.  Set the Metallic to pure black is sufficient.
  You can download the attachment in this post to obtain the Roughness maps directly.

Convert to PBR Outfits and Accessories

Apparels and accessories can use CC 2.0 Beta auto-conversion and Adjust Color utility to achieve the PBR transition.


Classic Shader
In the following embedded content example, "Jeans_D" does not have have immediate noticeable change under the Classic shader system.




PBR Shader
The Metallic channel will auto-generate when switching to the PBR shader system.  This is done by inverting the specular channel and plugging the result into roughness. 
Adjust Color parameters can be used to configure the look according to one's desire.




Classic vs PBR channel comparison