Scenes in Unity are created by

using 3D or polygonal meshes.

Polygonal meshes are the underpinnings

of all games made in Unity.

Whether it's a simple 2D game where the

characters are attached to a simple plane,

a complex particle system full of sprites,

or a full 3D game with animated characters -

that game will use meshes.

All objects in our game, from a simple

quad or basic plane, to a complex

3D character or environmental geometry

will be a polygonal mesh.

Polygonal meshes, or simply meshes

are created from very simple basic elements.

Points and lines.

The points are called Vertices

or Verts for short.

A single point is a Vertex.

These define a point in 3D space.

Between these points lines are drawn.

These lines are called Edges.

The edges create something called a Polygon.

which in Unity will be a triangle.

These polygons define the mesh of our object.

The meshes used in Unity

are not created in Unity.

With the exception of the basic primitive

shapes which are built in to Unity

all of the meshes that we will be using

need to be created in an external

mesh modelling application.

These mesh models, either created or

purchased will need to be imported in to

Unity for use in our scenes.

See the Mesh Import lesson linked below.