Hi guys,
Can someone help me with this problem?
My model renders with strange shadows when I hit BPR.
I try to look in different settings and even change materials but it is still the same.
Preview:
BPR:
Attachments
The large round part of your model might be inverted/flipped. If so you can use Tool: Display Properties to either enable double sided, or to flip the normals.
Thank you @Cryrid 
When I went to check it in Display Properties I’ve notice that in BPR Settings, BPR Transparent Shading was turned on. For some reason I had to switch it by mistake and that was the problem.