i made a cog but it got an issue with something

so i just made a cog using blender and when i render it after smoothing it out a bit turns out it became this

so is there a solution to this ???

 

@011Jackboxgames
That looks like a normals problem.

Remove the smoothing, and then go into edit mode, select all of the faces with ctrl A, and then look for the button, to recalculate or flip the normals. Hopefully, that solves the problem.

 

ok thanks that helps