3D Model is Translucent

use another shader maybe?

EDIT: @ProgrammerAdam12

Ok its quite some work. At Mixamo you have to Download your Model as a Colladad(.dae) file.

Then you need to import the whole Folder which you downloaded at Mixamo. now in the Folder you should see two things:

1. Your Model

2. A Folder called textures

   ---

now press on the model. in the inspector there should be now the Importer Window (Something like "Samba Dancing Import Settings") hit the Materials Button.

1. if the Checkmark "Import Material" is disabled, enable it.

2. Dropdown Location should be : "Use Embedded Materials".

3. Hit the Button Extract Materials. (best save it to the Models Folder).

4. Now the Material part of the Import Settings shouldn't be "Empty (Material)" anymore.

   ---

Now we need to remap the Materials.

1. Go the Folder where you saved the New Materials.

2. Click on the first Material(like "Bodymat").

3. In the Top of the Inspector there you can choose your Shader. For now Standard (by Default) is fine.

4. Be sure RenderingMode is set to Opaque.

5. Re-asign now following Textures to the Material(Normalmap to Normalmap,Specular to Metallic,Gloss to Occlusion). Just be sure to take the right Texture to the right Material(body Texture to body Material and so on).

   ---

You can tweak around in the Material settings as you like =) if it's to shiny turn down Metallic Smoothness or Occlusion.

Hope this answer helps you.