Part 1 Creating Realism

XR Realism

3D environment: 3D Assets, Particle Effects, Lighting/Lights, Animations, Texturing/ Materials

Material Explained

make 3D models look realistic glossiness and reflection

Complex material » Layers

Classes of Materials

Bitmap texture: Old Wall Texture Procedural maps: Procedural Wood Texture

General Concepts of Light Maps

Diffuse Ambience Specular ![[cd0066a2b1a3020289607c36f3c5771.png]]

Combining Types of Materials

Diffuse Color

Diffuse – Light spread evenly across the surface. there is no black line in your photo no shadow

Specular Maps

Specular Map Specular Color Map Specular Level Map

Glossiness Map

affect the specular region of a shiny object

Luminance Map

brightness of a surface based on the map’s grayscale intensity

Opacity Map

use grayscale bitmap images to control opacity and transparency reflect

Bump Map

The different intensities of light and dark tones of the grayscale bitmap

Texture only change detail, but don’t shape the item

Refraction Map

simulates the properties of glass,water , or other transparent material

UVW Unwrap(tranditional)

flattening out 3D to 2D just like layers cover with each others

Lighting

Lighting adds the next layer of realism – allowing you to create shadows,
reflections and enhance the texturing

Lighting Theory

Light can be direct (more details )or indirect light will behave in different ways

Point Lights

simulating lamps

Spot lights

flashlights, car headlights and searchlights

Directional lights

position outside the range of the game world

Baking

Calculate all the lighting values, which turns them into textures and overlays them onto your assets

Foveated Rendering注视点渲染

uses an eye tracker integrated with a virtual reality headset to reduce the rendering workload fixed foveated rendering

Part 2 Animation for XR Engagement

let user be an active participant Persistence of vision» illusion of motion

Traditional Animation

Flipbook stop motion

Cel-animation:

Background and static objects are drawn onopaque paper. opaque paper, sheet of transparent cellophane

Keyframe

• Key-frame represents the starting or ending points (positions of all objects).
• Key-framing is the process of defining all the points which define all the major pose/position for all object in the scene.

  In-betweening

  linear interpolation, but not realistice results

  Interpolation in 3D software

  Animation Curves

  Curve Editing

  Kinematics and Hierarchical Kinematic Modeling

  Forward Kinermatics» 3D model Inverse Kinermatics» realised

  Skeletal Animation

  Skin Skeleton

  Rigging(skeletal) and Skinning(attaching)

• Rigging - refers to the creation of skeletal system(hierarchy of bones) that represents your 3D character.
• Skinning - refers to the process of attaching the skin to the skeletal system.

envelope mirroring

Pose-to-Pose

the link between these two positions(keyframes)