I have a small problem. I’ve created two periscopes. The one on the right was created exactly as i was instructed in the tutorial. The second one is diffrent. I’ve made two wedges, join them and than i’ve added four edges in edition mode to create the same shape. Why the middle section is darker?
You have your normal inwards. You can fix this by going into edit mode in the object and press CTRL + N (mesh -> recalculate normals outside).
Cheers, Jax