Lesson 02 · Materials

How Textures Work

A materials lab on UV maps, color, roughness, fake bumps, and weathering. Same shape. Maps layered one at a time.

Definition

In short

Texture maps are flat images that wrap a 3D shape through UV coordinates.

Albedo is the color, and roughness is how the shine changes across the surface.

A normal map fakes bumps, and displacement moves the vertices.

A weathering mask ages a surface.

Time 20 min
You will learn how flat images add color, bumps, and rust
Try first drag across the big studded sphere to see the real material
Core lesson Normals fake · displacement moves

Enter the lab ↓

What you will see

UVsA flat image wraps a 3D shape.
AlbedoColor painted across the surface.
Roughness mapPolished vs worn patches.
Normal mapFake bumps that bend light.
DisplacementReal vertices move. Outline changes.
WeatheringA mask ages clean metal into rust.
Normal map · fake bumps
Displacement · real geometry

In the world

Where you see this

These maps are not only for the lab. Named jobs use the same images on games, film, products, cars, and buildings.

  1. Games

    Texture artist

    A texture artist paints color, roughness, and normal maps through UVs. Normal maps show stitches and scratches without extra geometry.

  2. Film and animation

    Look-development artist

    A look-development artist uses roughness maps for shiny and dull areas. Displacement makes true bump shadows in close-ups.

  3. Online stores

    3D product visualization artist

    A 3D product visualization artist keeps color and roughness separate. Matte labels, glossy caps, and brushed metal each catch light correctly.

  4. Car paint and fabric

    Automotive visualization artist

    An automotive visualization artist uses normal and bump maps for weave and leather grain. Roughness sets how sharp the paint reflection is.

  5. Architecture

    Architectural visualization artist

    An architectural visualization artist uses height and normal maps for brick, stone, and wood. Weathering masks add stains so designs do not look fake-new.

For teachers

Short objectives, one classroom loop, and how the lab maps to studio practice and materials science.

Learning objectives

  • Explain what UV coordinates do on a simple solid.
  • Separate albedo (color) from roughness (shine variation).
  • Contrast normal maps (fake bumps) with displacement (real geometry).
  • Describe weathering as a mask that drives several material channels.

10-minute classroom activity

1) Bring a cereal box. 2) Students sketch the six faces as a cross (UV unwrap) and draw a logo on one face. 3) Open Specimen 01 and match where the logo would land on a box. 4) Finish on Specimen 03: write one sentence on why a normal-map brick wall would cast a flat shadow.

Art & design map

Game texturing, product finishes, concept look-dev, UV layout for packaging and sculpture wraps.

Materials science map

Surface roughness variation, corrosion / oxidation fronts, coating wear, topography vs optical illusion of depth.

FAQ

Common mistakes

Short answers to questions students ask after the specimens.

Is a normal map the same as displacement?
No. A normal map only bends the light. The mesh stays smooth. Displacement moves the vertices, so the outline can change.
Does albedo include lighting?
No. Albedo is the surface color alone. It does not store light, shadow, or shine.
What are UVs for?
UVs tell each point on a 3D shape which pixel of a flat image to use. That is how a texture wraps the object.
Why separate roughness from color?
Color and shine do different jobs. A dark label can be matte, and a pale cap can be glossy. Separate maps let each part catch light in its own way.
Does a weathering mask only change color?
No. The mask picks where age shows. Color, roughness, and metalness can change together.