Export from blender to fbx- model almost transparent

Hello, could you please help me with a problem that I have had for 2 weeks? I have a problem in terms of exporting from blender to unity, when I import the fbx file to unity, the model comes out almost transparent, even if I have the materials so that I can extract them or not from the model, it still looks the same.


This is a model I recently take as obj file and put skeleton on it.
Not only happens with these obj models, it also happens with some mmd models that I download, It has me very frustrated since I can not find a solution in any forum regarding this issue, a solution would be very helpful! Thank you.

 

I solve the problem, thanks for the answer!

I need to extract the default or "none_model" material, assign the default color (like a a white gray) and later I put the material or texture from the model and I could modify the color in albedo.

 

Wow! That is an interesting way to fix that problem. Cool.