1

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The Principled BSDF

One shader that makes almost every material

Active

🎯

Goal for this step

Understand the four sliders that define 90% of all surfaces.

1Test scene: a few spheres on a plane, rendered viewport (Z → Rendered), Cycles if your machine allows.
2Every new material is a Principled BSDF, an "everything shader" built on real physics (PBR).
3The big four: Base Color (what it is), Metallic (0 or 1, almost never between), Roughness (mirror 0 → chalk 1), IOR/Transmission (glass).
4Drill: make one sphere chalky red (rough 0.9), one glossy plastic (rough 0.15), one brushed metal (metallic 1, rough 0.4).

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Real-world rule: pure metals are Metallic 1, EVERYTHING else is 0. "Half metallic" materials do not exist in nature, the slider is a switch, not a dial.

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Fill in the Blanks

+15 XP

Blender’s do-everything shader is the BSDF. A mirror finish means Roughness near , and true metals set Metallic to exactly .

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Knowledge Check

+15 XP

What does the Roughness slider physically represent?

AHow heavy the object is

BHow scattered the surface reflections are, microscopic bumpiness, from mirror to chalk

CPolygon density

2

🪙

Metal, Glass & Glow

The three showstopper materials

Locked

🎯

Goal for this step

Build convincing gold, glass and neon glow materials.

1GOLD: Metallic 1, Base Color warm yellow-orange (metal colour lives IN the base color), Roughness 0.25.
2GLASS: Transmission 1, Roughness 0 (clear) or 0.3 (frosted). Cycles renders it true; in Eevee (4.2+) it works via raytracing, older Eevee needs Blend Mode tweaks.
3GLOW: an Emission value above 0 with a colour, the surface becomes a light source. Strength 5+ for neon signage.
4Combine: a gold ring on a glass slab under a neon light = a product shot. Render it (F12)!

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Fill in the Blanks

+15 XP

Glass needs set to 1. Making a surface emit its own light uses the value. Frosted glass is clear glass with higher .

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Knowledge Check

+15 XP

To tint a metal gold vs silver you change…

AThe Metallic slider

BThe Base Color, metals get their colour from their base colour, with Metallic staying at 1

CThe Roughness

3

🗺️

UV Unwrapping

Flatten 3D surfaces so images can wrap them

Locked

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Goal for this step

Unwrap a cube and understand seams.

1To put an IMAGE on a 3D surface, the surface must be flattened to 2D first, like peeling an orange flat. That flattening is UV unwrapping.
2Open the UV Editing workspace tab (top of the window), 2D left, 3D right.
3The orange-peel cuts are seams: in Edit Mode, select edges and Ctrl+E → Mark Seam. For a cube: seam 7 edges so it unfolds into a cross shape.
4Select all (A) → U → Unwrap. The left panel shows your flattened cube!
5Try it on your character too, seams down the sides where they hide.

✏️

Fill in the Blanks

+15 XP

Flattening a mesh into 2D is called unwrapping. The cut lines are , marked with Ctrl+E, and the unwrap itself is under the key.

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Knowledge Check

+15 XP

Why do seams go where they do on clothing and characters?

ARandom placement

BHidden places (sides, inner arms), texture breaks at seams, so artists hide them exactly like real tailors do

COnly on flat faces

4

🖌️

Texture Painting

Paint directly onto your model in 3D

Locked

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Goal for this step

Create an image texture and paint your character’s face.

1With the character unwrapped, switch to the Texture Paint workspace.
2Add a paint canvas: Texture slot → Base Color → new image (1024×1024, a skin base colour).
3Paint IN THE 3D VIEW, strokes land on the model and appear on the flat image simultaneously. Magic.
4Paint: eyes, brows, a mouth, shirt details, shoe caps. Low-poly + hand-paint = timeless indie style.
5CRITICAL: painted images are not auto-saved with the file! Image → Save As in the image editor, and enable Image → Pack to embed it.

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Closing Blender WITHOUT saving the painted image file loses the painting even if you saved the .blend. Save the image separately or pack it!

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Fill in the Blanks

+15 XP

Painting happens in the Texture workspace onto an image mapped through the UVs. Painted images must be separately or packed into the file.

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Knowledge Check

+15 XP

You paint a dot on the model’s face and a dot appears on the flat image. What connects them?

ABlender guesses

BThe UV map, every 3D surface point corresponds to a 2D image point

CThe camera angle

5

🧩

Procedural Nodes

Textures from maths, no image files at all

Locked

🎯

Goal for this step

Build a wood-like procedural material in the Shader Editor.

1Open the Shading workspace, your material as a node graph.
2Shift+A → Texture → Noise Texture; connect its Color output into Base Color. Instant marble-ish pattern, no image involved!
3Insert a ColorRamp between them (Shift+A → Converter) to remap the noise into exactly two wood tones. Drag the flags to taste.
4Stretch the pattern into grain: add a Mapping node before the noise, scale Y to 8.
5Procedural = infinite resolution, zero files, always editable. The node graph IS the texture recipe.

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Fill in the Blanks

+15 XP

Node materials are edited in the workspace. A node remaps noise into chosen colours, and a Mapping node can the pattern into grain.

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Knowledge Check

+15 XP

Procedural textures beat image textures when you need…

AA photograph of a logo

BPatterns that tile forever, scale to any resolution and stay editable, stone, wood, noise, grunge

CFaster viewport FPS always

6

✨

Material a Full Scene

Dress your Episode 1 house with everything you learned

Locked

🎯

Goal for this step

Apply the whole toolkit to one scene and render a portfolio shot.

1Open your Episode 1 house scene. Time for the glow-up.
2Walls: procedural noise → subtle plaster. Roof: ColorRamp brick tones. Door: your wood grain nodes. Windows: GLASS. A porch light: EMISSION.
3Ground: dark rough material (0.9) so the house pops.
4Render with F12 in Cycles. Compare with your Episode 1 render, same shapes, unrecognisable quality. Materials did that.
5Save everything, Episode 6 relights this exact scene for drama.

✏️

Fill in the Blanks

+15 XP

Window panes use a material (Transmission 1), the porch light uses , and the plaster walls come from a texture node.

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Knowledge Check

+15 XP

Same models, new materials, dramatically better render. The lesson is…

AModels never matter

BSurfaces carry as much realism as shapes, material skill multiplies every model you ever make

CCycles is cheating

Make It Real!Materials & Textures

Make It Real!
Materials & Textures