The issue of the spine appearing too bright in Unreal Engine while the texture is darker could be related to the alpha settings used during the export and import process. Specifically, Unreal Engine requires non-premultiplied alpha textures. If your texture was exported with premultiplied alpha, it could cause discrepancies in brightness.
To resolve this, ensure that your texture is exported without premultiplied alpha. You can check and adjust this setting in the texture packer settings during the export process from Spine.
Additionally, verify the material settings in Unreal Engine to ensure they are configured correctly for non-premultiplied alpha textures.
For more detailed information, you can refer to the following discussion: In UE5, the SpineLitNormalMaterial have black lines.
