■ Vertices
▬ Edges
▲ Faces
🎨 Textures

Inside 3D Models

Discover the invisible skeleton of 3D graphics. Every character, building, and world starts with the same simple building blocks.

3D Models
1

The Building Blocks

Every 3D model is made of just 4 things. Click on each to highlight it in the model.

Mode: Textured
View Mode
Layer Visibility
● Vertices
▬ Edges
▲ Faces
✦ Normals
●
Vertices
8
Points in 3D space (X, Y, Z coordinates)
▬
Edges
12
Lines connecting two vertices
▲
Faces
6
Flat surfaces made of 3+ vertices
➔
Normals
6
Direction each face "points" for lighting
Fun Fact: A typical video game character has 15,000-100,000 triangles. The dinosaurs in Jurassic Park (1993) had only about 1,000 triangles each!
2

Low-Poly vs High-Poly

More polygons = more detail, but also more processing power needed.

■ Low-Poly
Vertices: 8
Faces: 6
■ High-Poly
Vertices: 386
Faces: 768
Did you know? Mobile games often use 1,000-10,000 triangles per character, while modern console games use 50,000-500,000. The choice depends on the device's power!
3

UV Mapping: Wrapping Textures

How do flat images wrap around 3D shapes? UV mapping is like gift-wrapping a box!

🖼 Unwrapped UV Map
The 3D cube is "unwrapped" into a flat cross shape. Each face of the cube corresponds to a square in the UV map. When you paint on the flat UV map, it appears on the 3D model!
Why "UV"? The letters U and V are used because X, Y, and Z were already taken for the 3D coordinates! U is horizontal, V is vertical on the texture.
4

Try It: Shape Builder

Click to add vertices. See how connecting points creates 3D shapes.

Preset Shapes
Subdivision
Display
Current Vertices
8
Did you know? When you click "Subdivide", each triangle is split into 4 smaller triangles. This quadruples the face count! That's how artists add detail to models.

You've Explored 3D!

Now you know the secrets behind every 3D character, building, and world.

0
Total Vertices Seen
0
Total Faces Explored
0
Time Exploring

Vertices

Points in 3D space with X, Y, Z coordinates

Edges

Connect vertices to form the skeleton

Faces

Fill in the surfaces (usually triangles)

UV Maps

Wrap 2D textures onto 3D shapes

Ready to Create?

Put your new knowledge into practice!

Open SketchForge → More Discoveries

Suggest a Correction