The settings I used for export are these:
Forward: -Z Forward
Up: Y Up
Selection Only
Apply Modifiers
Include Edges
Write Normals
Include UV’s
Write Materials
Triangulate Faces
Objects as OBJ Objects
Keep Vertex Order
Scale: 1.00
Path Mod: Auto
Am I using the wrong settings or is this something else?
Look closely at the mesh color in Blender: That’s a darker shade of grey than usual.
And that means that the normals of that mesh are flipped. Or in other words: the mesh is quite literally turned inside out.
Select the mesh in Blender, Tab into Edit mode, hit A to select all and then Ctrl+N to recalculate the normals. If that doesn’t change anything, you will most likely have modelling errors that prevent Blender from correctly determining the inside and outside. Impossible to troubleshoot those from a screenshot.
I hit Ctrl+N in Edit Mode and it didn’t change anything, but I managed to solve the issue with it being inside out by clicking on “Make Manifold” using the 3d Printing addon I had. Thanks for responding though.