When I extruded vertices in edit mode, for some reason one of the sides of my 3-D model (the textured-looking side to the right) is creating a lot of errors.
First off, it automatically sets extrusions on the x-axis.
Secondly, it doesn't allow me to extrude planes into 3-D shapes.
Thirdly, I can't increase the height of vertices without it creating a new face.
Finally, it renders those automatic textures to create a grainy black texture in render mode.
I attached an image with the solid object (top) and the rendered object (bottom).
Note: I did not set any textures or alter the lighting on the model. Also, the left gray side is working perfectly fine without errors.