MSFS20 Wrong shadows orientations

[DeMBaSs]

Greetings! I've searched the forum and found no answer to my question....
I'm new to the development, so it's obvious that I'll end up with some troubles.
Trouble is shadows on my object... What did I wrong?
Please help. I'm out of thoughts. I checked face orientation in Blender all good.

I think this is smth about normal maps, but I'm not sure to be honest.
Thanks in advance, really looking forward to your suggestions

 

[rhumbaflappy]

My first thought was to go to Edit mode, select all, Mesh | Normals | Recalculate Outside. But you say you checked the normals orientation. To check if the normal texturing is OK, just export without the normal textures in the Materials, and see if the problem is there.

 

[Rick Celik]

Are your normal maps all DirectX and not OPENGL? also make sure your AO channels are correct.

 

[DeMBaSs]

Are your normal maps all DirectX and not OPENGL? also make sure your AO channels are correct.

Yeah, I cheked it, and where I can see it, I changed them from OpenGl to DirectX. As you can see on the pictures below not so much of a result...
About AO I cheked everything in green channel with alpha channel.
And lastly about Flipped Normals sending screenshot from blender

 

[Rick Celik]

Send me your RGB texture. Your AO is in your R channel.

 

[DeMBaSs]

My bad. I mean Roughness. AO wasn't presented in textures set, so I didn't make any Red Channel at all. Only Blue and Green.
But I completely flipped textures from a good one, and I've got pretty same result (Photo 2). This Texture is got the AO and works absolutely fine on the same objects. (Photo 3) Mb It's not textures afterall... I'm so confused
UPD. I Also set all metallnes value in Blender to 0. Got a little bit better, but not so much (Photo 4). Also this fragment had no metallness or AO at all, only roughness value.

 

[DeMBaSs]

Send me your RGB texture. Your AO is in your R channel.

So, A little update of this problem. So the problem was in AO. After I've made AO map by myself and made united AORM maps everything is good.
But, the arches have had that wierd shadows... So I unwraped UV Maps and added Shade Smooth. I guess that's finally solved my problem. At least It's not looking terrible right now
Thank you for the help! It's so nice to have a place where I can get a help!
Rick, thank you especially, you've set me to the right path!

 

[Rick Celik]

Glad you've fixed your issue!