https://youtu.be/hDXD-1i3DiA Hi! I'm a complete beginner in Blender. Yesterday I made a 3d model and wanted to create a texture for it in Substance Painter, but there is a problem, when I line it up in a certain way it seems like there is no front 'wall' (you could see the other side of it). See the link. There was also a similar problem when I tried to texture paint it in Blender (the paint would just appear on the opposite side of object that I was painting). Did I make some mistake while making a model? What could it be and how can I fix it?