visible back braces

[Elroy Bean]

Greetings,
I have a Yamaha LL6 with a laminated rosewood back. Meranti wood is used for the middle layer. From new I've noticed while tilting under the light I can see the outline or imprint of the back braces. They're not felt, nor all that visible, yet distinct enough. I don't believe it be a problem now or in the future, so I'm more curious how many others have noticed this in their own guitars?
Thank you.