I've just finished developing Super Texture, a one-click addon for generating multiple PBR maps from a single image! The implementation is entirely built using nodes and doesn't rely on any file importing and produces instant results.
Better still, all output is completely dynamic can be animated and doesn't rely on any additional 3rd party software with manual exporting and opening of images.
From 1 image it will generate:
- Specular / Metallic
Currently Super Tile is 25% off during launch week for $7.50