Light build problem.

Hi !

Today i met a problem :<
I was building my scene for some time. I decided to build the lights for test if everything is working. This is what i saw
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How can i repair that ? I put mushroms for test and it looks like light is effecting dark triangles but those bright seams to not be effected by light.

(sorry for my english if i wrote something Incomprehensible)

EDIT:
Oww i frogot to mention -> its basic material 1 vector color and constant for roughness

EDIT2:
And there is no UV error wahtsoever

Any ideas ?

whats wrrong ?

OK …I found a solution and walkaround