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description
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3d-games
3D game development principles. Rendering, shaders, physics, cameras.
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2026-02-27
3D Game Development
Principles for 3D game systems.
1. Rendering Pipeline
Stages
Optimization Principles
Technique
Purpose
Frustum culling Don't render off-screen
Occlusion culling Don't render hidden
LOD Less detail at distance
Batching Combine draw calls
2. Shader Principles
Shader Types
Type
Purpose
Vertex Position, normals
Fragment/Pixel Color, lighting
Compute General computation
When to Write Custom Shaders
Special effects (water, fire, portals)
Stylized rendering (toon, sketch)
Performance optimization
Unique visual identity
3. 3D Physics
Collision Shapes
Shape
Use Case
Box Buildings, crates
Sphere Balls, quick checks
Capsule Characters
Mesh Terrain (expensive)
Principles
Simple colliders, complex visuals
Layer-based filtering
Raycasting for line-of-sight
4. Camera Systems
Camera Types
Type
Use
Third-person Action, adventure
First-person Immersive, FPS
Isometric Strategy, RPG
Orbital Inspection, editors
Camera Feel
Smooth following (lerp)
Collision avoidance
Look-ahead for movement
FOV changes for speed
5. Lighting
Light Types
Type
Use
Directional Sun, moon
Point Lamps, torches
Spot Flashlight, stage
Ambient Base illumination
Performance Consideration
Real-time shadows are expensive
Bake when possible
Shadow cascades for large worlds
6. Level of Detail (LOD)
LOD Strategy
Distance
Model
Near
Full detail
Medium
50% triangles
Far
25% or billboard
7. Anti-Patterns
❌ Don't✅ Do
Mesh colliders everywhere
Simple shapes
Real-time shadows on mobile
Baked or blob shadows
One LOD for all distances
Distance-based LOD
Unoptimized shaders
Profile and simplify
Remember: 3D is about illusion. Create the impression of detail, not the detail itself.
When to Use
This skill is applicable to execute the workflow or actions described in the overview.
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