texturing - Textures Not Showing in Viewport (Blender 2.8) - Blender Stack Exchange
Can't apply material to model - Materials and Textures - Blender Artists Community
Cycles material bug? (Material won't render or show in viewport) - Materials and Textures - Blender Artists Community
Blender 2.80: All materials appear black - Help - appleseed Users Forum
I can't see my smoke sim in rendered view for some reason. I have the material and the lighting set up but it still won't show up. (Cycles) : r/ blender
texturing - Material Properties-Material Preview doesnt show anything ( totally black) - Blender Stack Exchange
blender internal render engine - Material won't show in solid mode - Blender Stack Exchange