a closed box has 6 faces, each having a side that faces the inner part of the box and a side facing outwards. In order to help our minds understand what normals can be, we could think each 3d face having an inside and an outside. Here you can download the box.blend file. With default settings Blender does not display the normals. I increased the Normal vector's dimension to 1.5 (NSize: 1.500) otherwise they would be too small. They are short blue lines, starting from each face. While in Edit Mode, hit F9 (Editing), then you hit the Draw Normals buttons inside the Mesh Tools 1 panel in order to make the face Normals appear. That way I can look inside it.Įvery face has a Normal vector that tells Blender where the face “faces”. These short notes are aimed at providing new Blender users with a few ideas about how to work with Face-Normals and Transparency, keeping in mind what happens when you convert the model to AC3D file format in order to use it inside FlightGear.Īs a first example I created a box, I removed its upper face, so I ended up with a 5 sided (A,B,C,D and E) box. Tutorial Files (right click: Save Link As) 1 Blender and AC3D: Normals, Single and Double-sided faces, Transparencyīlender and AC3D: Normals, Single and Double-sided faces, Transparencyīlender v.2.41 - AC3D Exporter v.
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