poi
This is a known limitation of the Spine Import PSD feature, as you can read in the User Guide.
Adjustment layers are metadata that are not stored as raster image data in the PSD, but are applied only during export. So we would need to reverse engineer the PSD code to get the same result, and we won't do that.
As the user guide says, there are workarounds though:
- Convert the unsupported layers into smart objects. Photoshop will then save pixel data of the resulting layer in the PSD file.
- Use the PhotoshopToSpine script or other scripts available in the spine-script repository.
- Create a Spine-compatible PSD using the SpineCompatiblePsd script.
Since you have Photoshop, the easiest way is to convert layers that use adjustment layers into smart objects.
In that case Photoshop will store the layer in the PSD as if it were exported, allowing us to bring into Spine what you actually see in Photoshop.