Time for action – exploring the models

Click on the little gray arrow next to the handsAndTray model. This model contains two separate meshes—a pair of hands, and a hospital dinner tray. There seem to be two instances of each, with two different icons next to them—a blue cube icon with a little white page and a black meshy/spiderwebby-looking icon.

Here's what's happening. The top-level handsAndTray parent is the .fbx file that Unity imported. Before you can use this file inside the program, Unity runs it through an import process to make sure that the models are the right size and orientation, along with a slew of other settings. The routine that preps the models for use in Unity is the FBXImporter. You can see it by clicking on the parent handsAndTray model in the Project panel.

There's a lot of fancy stuff going on with the FBXImporter. Thankfully, we don't have to touch much of it. Our biggest concern is that the models are facing the right way, and are the right size. Different models...