Some problem with texture

Development Asset Creation
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1

I setup a texture on ship but it get darker on certains angles and on top of ■■■■ inside and bottom ship on outside

Problem 1
Problem 11083×903 61.5 KB

Problem 2
Problem 21043×787 38 KB

Ive turned the ship upside down and it looks like this

Problem 3
Problem 31421×949 73.6 KB

Sky is on Static, Directional Light on Movable, no matter how i turn the ship, top texture on inside will be darker and the bottom outside texture will be darker.