Texture for 3D models are transparent at places I am using Blender 2.83 as a part of my Masters project. I have obtained 3D models of various fishes (.obj files), and I import them using
File &gt; Import &gt; Wavefront (.obj)
The models loads without errors, but the textures are &quot;corrupted&quot;. I would appreciate any help and/or pointers on how to fix this. You can see images below. The &quot;dark spots&quot; are transparent spots

Some (maybe all) of the models are obtained from sketchfab, which have 3D previews where the textures look correct. The fish &quot;groups&quot; are the models viewed from left and right.
Beneath you can see a closer look of a model as well as the UV-editor view in case that is relevant.
This is cause by your material's blend mode.
You have 2 options:

In Material settings uncheck Show Backface
Change Blend mode to Opaque (this will fully disable transparency)