I'm following Lynda's tutorial and I've encountered something that I don't know how to fix.
some of my objects appear in black while I'm in material preview on the layout panel but has no problem on texture painting layout or render view.
im sure its something simple but i have no clow what to do

[![enter image description here](https://i.stack.imgur.com/W165p.jpg)](https://i.stack.imgur.com/W165p.jpg)

[![enter image description here](https://i.stack.imgur.com/3TCEi.jpg)](https://i.stack.imgur.com/3TCEi.jpg)

[![enter image description here](https://i.stack.imgur.com/bOzO3.png)](https://i.stack.imgur.com/bOzO3.png)

[![enter image description here](https://i.stack.imgur.com/bbATy.jpg)](https://i.stack.imgur.com/bbATy.jpg)