How to fix turning black in addons 3D models?

When addons 3D models turn black, fix it by checking material/texture links, enabling materials, or adjusting lighting—here’s how. Broken texture paths (from moving files) or disabled materials cause the default black look; dim scene lighting can also darken models. For Blender: Use "File > External Data > Find Missing Files" to relink textures. For Unity/Unreal: Reimport the model with "Import Materials" enabled to resolve material issues.