Annex 2: Inverting Normals
![](../../../images/newfasant/gui/NormalsFig01.png)
We created a cube of side 2. We select the cube and click on normal button in the upper bar.
![](../../../images/newfasant/gui/NormalsFig02.png)
The normal vectors with their senses are visualized.
![](../../../images/newfasant/gui/NormalsFig03.png)
By clicking on the main window the sense of the normal vectors are changed.
![](../../../images/newfasant/gui/NormalsFig04.png)
![](../../../images/newfasant/gui/NormalsFig05.png)
![](../../../images/newfasant/gui/NormalsFig06.png)
![](../../../images/newfasant/gui/NormalsFig07.png)
Now we have the cube with a brilliant color because its normal is pointing outgoing.
![](../../../images/newfasant/gui/NormalsFig08.png)
![](../../../images/newfasant/gui/NormalsFig08b.png)
Some time is useful change the color to a more clear one. For that click on Layer, manage layer.
![](../../../images/newfasant/gui/NormalsFig09.png)
Change the color of the layer.
![](../../../images/newfasant/gui/NormalsFig10.png)
Now we will change the sense of the normal of only the surface in the top of the cube. We select the cube and explode it.
![](../../../images/newfasant/gui/NormalsFig11.png)
We select the surface in the top and click on the "Normals" button.
![](../../../images/newfasant/gui/NormalsFig12.png)
We click on the main window the change the sense of the normal of the top surface.
![](../../../images/newfasant/gui/NormalsFig13.png)
We save the new normal sense of the top surface by clicking on the “Normal” button.
![](../../../images/newfasant/gui/NormalsFig14.png)
Now the top surfaces are darker than the other surfaces because the normal in the top surface is pointing ingoing.