Dark texture areas when baking textures

Someone can explain what is happening in the image below? I am trying to bake my texture, so for every material slot I have inserted an image texture, the same for every material slot. but when baking, most of my texture is dark, and only some areas are normally lit… :thinking: :thinking: :thinking:

Thanks for any idea that can solve the issue :slight_smile:

my first thought is , how many light sources do you have in the scean ?

Global illumination with environmental texture only, no direct lighting. May be the issue?
EDIT: I have tried with Direct Lighting too, but same problem.
One thing that i can say, the object is made of saperated objects (as for ailerons, rudder airframe, etc) that was joined togheter with CTRL-J. The issue I notice is that just the ailerons and rudders are lit.
So I think someone in the airframe ex-object is broken, maybe?

RESOLVED! :grinning_face_with_smiling_eyes: :grinning_face_with_smiling_eyes: :grinning_face_with_smiling_eyes: :stuck_out_tongue_winking_eye:
It was a normals problem. First I have reset the normals, then i have recalculated it and then i have flipped all of them: some normals were pointing inside!!!
I hope this solution will be helpful for someone.