Using an old atlas files?

[Refundmybirth]

I did exract files, I dont know what happening.

[Grim-es]

Looks like VRoid uses custom shader attributes and "special" nodes to achieve the desired effect, which cannot be directly applied to the texture without baking. To achieve a similar result, consider keeping the atlas as it is and using software like Photoshop, Gimp, or Paint.NET to perform image mixing and apply color corrections.