Why is the object not displayed when rendering in blender?

Question

3D

I'm going through a tutorial on creating a 3d model in a blender. At the next start of the render, a separate part of the model is no longer displayed. What could be the problem?

Answer 1

It's all about twisted normals. Click on the arrow next to the two circles in the upper right corner. Next, enable Face Orientation. All that will be highlighted in red, select in edit mode, press alt + n and select flip. Your normals will flip out and should be visible in the render. Think so

Answer 2

Either what ALTech1 said , or you accidentally hit a hotkey and excluded this object from rendering.