This asset uses a custom made shader using a technique called matcap shading. Matcap shaders are VERY fast because they don’t use lights. Instead lighting is calculated via a texture of a sphere.
When you add a model to the scene, by default it uses the standard Unity shader, because there are no lights in the scene, the result will be pitch black.
To solve this you have 2 options.
- You can either add a light to the scene and use any shader you want.
- You can choose to also use the matcap shader. Go to the material of your model. In the shader dropdown, pick Custom/MatcapAdditive or Custom/MatcapSimple as your shader.