It could:
- 1. Convert all image nodes to Octane nodes not only those connected to Cycles Principled node.
2. Cycles Gradient could be converted to Octane Gradient map.
3. Cycles Hue/Saturation/Value node could be converted to Octane Color Correction node.
4. Cycles Mapping node to Octane 3d Transform node.
5. Cycles Invert Color to Octane Invert Texture.
6. Cycles Mix node to Octane Mix Texture.