Step 1 - Creating your scene inside Sketchup

Something you need to know about real-time 3D modelling is that the best practice involves only rendering one side of a face. This simply means that if I create a plane, only one side of it will be rendered, because the other side will be occluded/invisible to the user. If you think of a 3D cube, the user will never see the inside of it, so why have the engine render both sides of each face?

The way to make sure you have the correct side showing is to do the following.

1. Make sure you are viewing your geometry with the monochrome option shown below.

This will allow you to see which side of the face is reversed. The darker face is the one that will be invisible inside Unity. You need to make sure the lighter face is the one you want to be visible inside Unity. The way to correct it is to select the face and right click it. This will bring up a small menu inside which is the option to 'reverse faces'. If you do it properly you should end up with something like in the image shown below.

Which should be followed by the face changing to a lighter colour...

This indicates that you have successfully reversed the face and that everything is progressing smoothly. So let's build up our scene a little, we're only practising here so don't invest too much emotion in getting a work of art done. True to form, I'm going to put a little house together as that's what I find most students do when familiarizing themselves with a 3D authoring environment.

Let's go to the next page for step 2, the lighting.

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