[PROBLEM] Asset become "transparent" with lots of dots in the default light?

Hello, I’m having a very weird issue with some assets (2)… seems everything is ok, but in the light I can see trough them and get weird dots, while without direct light or in unlit mode they are ok.

This pics shows the same asset having the issue, in the shadows is ok while in the light have this weird transparency.

Any clues? I’m new to unreal engine 5.

Thank you!

Could you show the material graph of this Asset?