Object face becoming invisible

1

Hi!

After I import my model into Shapespark the faces where the walls meet become invisible, while this does not happen on the 3D modeling software (Blender).

Shapespark screenshot:

wall
wall1920×972 26.7 KB

Blender wireframe:

wall blender wireframe.PNG
wall blender wireframe.PNG1232×923 129 KB

Blender solid:

wall blender solid.PNG
wall blender solid.PNG1312×918 34.8 KB

Other walls where this is happening:

image
image1919×1041 89.9 KB

Already check if it was a case of flippeds normals on the uv but after flipping the hole just became bigger, so the orientation was correct.

Scene link: https://meeting.vr360.pt/office-12042022/

Any tips on how to solve this?

Thanks!

2

I could take a look at it but you will have to send me blender model for me to analyze. It can be just the walls or whole scene. Send me a WeTransfer link in private message.