I started with a simple plane mesh and then continued working with by creating new vertices by selecting the edges and then subdivide them. Then I connected two vertices with
F button to create a new mesh and continued working like this, but it seems there are problems in model, because all visibile meshes are not real meshes and I can't select them! The normals show those who are correct.
I searched for info about this and found that a manifold thing could be the problem, but I'm not sure how to make this model correct again?
To create meshes with new vertices on edges and also create them with
CTRL button and a mouse click and then connect them with another edge or vertex, is this not a recomended way of working or how can I avoid getting this problem in the future?
Preciate some help to be able to continue with my model.