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3D Game Textures: Create Professional Game Art Using Photoshop

Name: 3D Game Textures: Create Professional Game Art Using Photoshop
Author: Luke Ahearn
ISBN: 9780240811482

by Luke Ahearn

May 2009

Intermediate to advanced

530 pages

11h 24m

English

Focal Press

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Copyright
Dedication
Acknowledgments
Introduction
What This Book Is NotWhom This Book Is ForOverviewChapter 1: A Basic (Game) Art EducationChapter 2: A Brief Orientation to Computer Graphic TechnologyChapter 3: Shaders and MaterialsChapter 4: Prepping for Texture CreationChapter 5: The Sci-Fi SettingChapter 6: The Urban SettingChapter 7: The Outdoor SettingChapter 8: Game EffectsChapter 9: Normal Maps and Multi-Pass ShadersBonus Chapter (on the DVD): The Fantasy Setting
The Concept Artists
1. A Basic (Game) Art Education
IntroductionChapter OverviewShape (2D) and Form (3D)Light and ShadowTextureColorHueSaturationBrightnessColor Systems: Additive and SubtractivePrimary ColorsSecondary ColorsColor EmphasisColor Expression or Warm and Cool ColorsPerspectiveOne-Point PerspectiveTwo-Point PerspectiveThree-Point PerspectiveQuick Studies of the World Around YouConclusionChapter Exercises
2. A Brief Orientation to Computer Graphic Technology
IntroductionCommon Features of Graphic File FormatsVector and Bitmapped FilesSource and Output Files: DistinctionsChoosing a File FormatFormat OptionsCompressionAlpha ChannelsDDS Format and DXTC (Output Format)PSD Format (Photoshop/Production Format)The Power of Two and the GridModular DesignUV MappingMapping TypesPlanarBoxSphericalCylindricalGame OptimizationsMIP MappingTexture Pages (or T-Pages, Atlas Textures, or Texture Packing)Unlit TexturesMultitexturing or Multiple UV ChannelsLightmapsMasking and TransparencyTexture Size and CompressionChapter ExercisesConclusion
3. Shaders and Materials
IntroductionShader BasicsCommon Shader EffectsDiffuse (Color Maps or Textures)BlendAverageAdditiveSubtractiveDetail MappingDepth of FieldHeat HazeSpecular Highlights and GlossinessBloom (Glow or Halo)Masking and OpacityIllumination and Unlit TexturesReflectionPan/Rotate/ScaleBump, Normal, and Parallax Occlusion MappingNode-Based Shader SystemsBasic Node OperationsRoot NodeCommon Node SetupsConclusionChapter Exercises
4. Prepping for Texture Creation
IntroductionGathering TexturesCreating Textures in PhotoshopDigital CamerasTips on Taking Digital PhotographsImage ResolutionDiminish Image TiltWatch the Auto SettingsDiminish Lens Distortion (Fisheye)Diminish Angle Distortion (Position)Diminish Lighting ProblemsDon’t Use the Flash If at All PossiblePlan for Alpha ChannelsPlan for TilingScannersTexture CollectionsThe InternetUsing 3D ApplicationsCleaning Your TexturesCroppingFixing Perspective (Bad Angles) with the Crop ToolResampling an Image Using CropCrop Using the Trim CommandThe Free Transform ToolTexture TilingThe Base ImageThe Context of the TextureThe Technology UsedFixing Light Variations Across an ImageOne-Way Tiling (Horizontal and Vertical)Three- and Four-Way TilingOrganic vs. Inorganic TilingTexture Tiling in PracticeEdge CopyProject: Tiling Stones Using Edge CopySetting up the ImageCleaning up the ImageCopy and Crop PartsRemoving the SeamsBuild/Rebuild Stones Using CloneTesting a Tiling TextureStoring Your TexturesTips for Good Naming ConventionsConclusionChapter Exercises
5. The Sci-Fi Setting
IntroductionThe Concept SketchDetermining Texture NeedsBase MetalMetal FillWall PanelFloor Panel with GrateAlpha ChannelDetail Texture: Vent/Panel/Bracket/HosePipeCaution StripesThe Complete SceneBuilding It up Using OverlaysTearing It Down for ShadersChapter Exercises
6. The Urban Setting
IntroductionThe Concept SketchBreaking out the Materials in the SceneBrickWindowsWoodConcreteMetalCreating BricksTiling Brick PatternBrick TextureMortar TextureBrick and Mortar DepthBrick CompletionTop of the WallBottom of the WallWindowsThe FrameThe GlassPane VariationsWeathering and DirtRain StreaksWindow AlphaWoodBasic Wood FillWooden PlanksWooden Planks, OfficeWood, CrateConcreteBasic ConcreteRougher ConcreteStained ConcreteGrooved ConcreteSectioned ConcreteDetails Using an Alpha ChannelMetalRusted MetalGarage Door MetalPipesBreaking out the DetailsNumbersStencil SignSmall SignSignDoorBuilding It up Using OverlaysTearing It Down for ShadersChapter Exercises

7. The Outdoor Setting
IntroductionThe Concept SketchBreaking out the Materials in the SceneForest FloorTree BarkTree BranchesEnd of LogRockFerns and the Complete SceneAdditional Information: The SkyAdditional Information: TerrainManual Terrain CreationTerrain Editing BasicsFreeform Terrain PaintingPush/Pull, Lower/RaiseSmoothing/ErosionNoise/TurbulenceFlatten/Set to HeightOther FeaturesTerrain TexturingTerrain Generation SoftwareL3DT (Large 3D Terrains)Tutorial: CloudsSingle CloudsWaterCaustics Generator
8. Game Effects
IntroductionStatic EffectsAnimated EffectsParticle EffectsWeatherLightingLight ShaftsCandle Glow/CoronaCandle Glow, Faint and DiffuseCandle Glow, Brighter and More FancifulTraditional CoronaWeaponsMuzzle BlastsImpact Effects: Bullet Holes and DebrisClothConcrete (Plaster)/BrickDirtGlassGrassMetalWaterWood
9. Normal Maps and Multi-Pass Shaders
IntroductionVertex vs. Per-Pixel LightingCreating Normal Maps in PhotoshopPainting Normal MapsSource-Based Normal MapsUse Parts of Existing Normal MapsCreating Normal Maps Using a 3D ProgramAssets for a Futuristic InteriorWall PanelsColorIlluminationSpecNormal MapWall Panel VariationsFloor PanelsColumnLight/Ceiling PanelDoorMonitorPipes and Hoses
The Fantasy Setting
IntroductionThe Concept SketchBreaking out the Materials in the SceneBreaking out the DetailsBase MaterialsStone FlooringRough Stone WallRough Wood BeamsPlaster or Light StuccoBase Metals: Dark Iron, Pewter or Dull Silver, GoldDetail TexturesTable TrimFur RugChestCandlestickMetal CandlestickCandle FlameCandle WaxSpellbookMetal Binding, Trim, and SpineRunesSpine DecorationDragon ScalesCover SymbolsPage EdgesGemOld MapWindowsBannerMagic DoorTearing It Down for ShadersPitcher and Goblet SetDiffuse MapBump MapEnvironment or Reflection Map (Cube Mapping)The Complete Scene/VariationChapter Exercises
Photoshop Exercises
About PhotoshopThe Photoshop Work AreaThe Menu BarThe Options BarThe Toolbar (Toolbox)Palette WellPalettesThe Status BarHotkeys or Keyboard ShortcutsToolbar ShortcutsCtrl ShortcutsOtherFile BrowserHistory PaletteRight-Click MenusGuides, Grids, Rulers, and the SnapSnappingRulersGuides and GridsLayersThe Layers PaletteLayer LocksLayer ToolsUsing Layers and Layer SetsLayer Effects and StylesLayer Blending ModesNormal and DissolveThe Darken ModesThe Lighten ModesThe Contrast ModesThe Invert/Comparative ModesThe HSL ModesHard Mix Mode CSAdjustment LayersBrushesCloning/HealingFiltersThe Filter Gallery (CS)Artistic FiltersBlur FiltersBrush Stroke FiltersDistort FiltersNoise FiltersPixelate FiltersRender FiltersSharpen FiltersSketch FiltersStylize FiltersTexture FiltersOther FiltersPaths

Content preview from 3D Game Textures: Create Professional Game Art Using Photoshop

Chapter 9. Normal Maps and Multi-Pass Shaders

Introduction

This chapter focuses on normal mapping, specifically on creating normal maps in Photoshop, with a look at creating them using a 3D program, and creating the supporting maps for a typical environment. I will explain how 3D applications are used to do this, but we won’t be doing this in this book.

In order to understand what a normal map is, first we will look at what a normal is and how lighting in games generally works. In short, a normal map creates an illusion of depth by recalculating the highlights and shadows on a low polygon surface using the information from a high-polygon model—and ...

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3D Game Textures: Create Professional Game Art Using Photoshop

by Luke Ahearn

Chapter 9. Normal Maps and Multi-Pass Shaders

Introduction

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