3. 3D Modelling

Question 1

What is the definition of 3D graphics?

Answer 1

3D graphics involve the creation, representation, and simulation of objects and environments in three dimensions (width, height, and depth).

Question 2

List some applications of 3D graphics.

Answer 2

• Video game development
• Animation
• Simulation
• Virtual reality
• Architectural visualization
• Product design

Question 3

What are the three axes of the 3D coordinate system?

Answer 3

• X-axis (horizontal)
• Y-axis (vertical)
• Z-axis (depth)

Question 4

What are the components of 3D objects?

Answer 4

• Vertices
• Edges
• Faces

Question 5

Define vertices in the context of 3D objects.

Answer 5

Vertices are points in 3D space where two or more edges meet.

Question 6

What is the purpose of edges in 3D modeling?

Answer 6

Edges are line segments connecting pairs of vertices.

Question 7

What are faces in 3D graphics?

Answer 7

Faces are flat surfaces enclosed by edges, typically triangles or quadrilaterals.

Question 8

What is the modeling process in 3D graphics?

Answer 8

Modeling is the process of creating a 3D representation of an object using various modeling techniques.

Question 9

What is polygonal modeling?

Answer 9

Polygonal modeling represents objects using flat surfaces (polygons) composed of vertices and edges.

Question 10

What is NURBS modeling?

Answer 10

NURBS modeling uses curves and surfaces defined mathematically to create smooth, flexible, and complex shapes.

Question 11

What is sculpting in 3D modeling?

Answer 11

Sculpting allows for organic modeling as if the object is being shaped from a digital clay.

Question 12

What is procedural modeling?

Answer 12

Procedural modeling uses algorithms and mathematical formulas to generate models procedurally.

Question 13

Name a popular open-source 3D modeling software.

Answer 13

Blender

Question 14

What is Autodesk Maya used for?

Answer 14

Autodesk Maya is a professional 3D modeling and animation tool widely used in the film and game industries.

Question 15

What is texture mapping?

Answer 15

Texture mapping is the method of wrapping a 2D image (texture) onto the surface of a 3D model.

Question 16

What is UV mapping?

Answer 16

UV mapping is the process of unwrapping the 3D model to a 2D plane to accurately apply the texture.

Question 17

What are materials in 3D graphics?

Answer 17

Materials specify how a surface interacts with light, including properties like diffuse color, shininess, and transparency.

Question 18

What is the importance of lighting in 3D graphics?

Answer 18

Accurately simulating light is crucial for creating realistic 3D scenes.

Question 19

List the types of light sources in 3D graphics.

Answer 19

• Point Light
• Directional Light
• Spotlight
• Area Light

Question 20

What is global illumination?

Answer 20

Global illumination simulates how light bounces off surfaces and affects other surfaces in the scene.

Question 21

What is ambient occlusion?

Answer 21

Ambient occlusion is a shading technique that simulates soft shadows in crevices and around objects.

Question 22

What is rendering in 3D graphics?

Answer 22

Rendering is the final process of generating a 2D image from a 3D model after lighting and texture are applied.

Question 23

What is rasterization?

Answer 23

Rasterization converts 3D objects to pixels for display and is widely used in real-time applications like video games.

Question 24

What is ray tracing?

Answer 24

Ray tracing is a rendering technique that simulates how light interacts with objects by tracing rays from the camera.

Question 25

What are the benefits of ray tracing?

Answer 25

Ray tracing produces highly realistic images but is computationally intensive.

Question 26

What is scanline rendering?

Answer 26

Scanline rendering processes one horizontal line of pixels at a time to create the final image.

Question 27

What does post-processing refer to in 3D graphics?

Answer 27

Post-processing refers to the effects applied to an image after rendering to achieve a desired visual result.

Question 28

Name some common post-processing techniques.

Answer 28

* Anti-Aliasing * Bloom * Motion Blur * Depth of Field

Question 29

What is a common challenge in 3D rendering?

Answer 29

Balancing realism and performance in rendering techniques.

Question 30

What are artifacts in 3D rendering?

Answer 30

Artifacts are issues like shadow artifacts, lighting inconsistencies, and texture stretching that can affect visual quality.

Question 31

What is a practical example of 3D modeling?

Answer 31

Creating a simple 3D object like a chair or a table in a 3D modeling tool.

Question 32

What is the purpose of applying textures to 3D models?

Answer 32

To enhance realism by adding surface details.

Question 33

What is Blender used for?

Answer 33

Blender is an open-source software for 3D modeling, animation, and rendering.

Question 34

What does the conclusion of the unit emphasize?

Answer 34

Mastery of 3D graphics concepts is crucial for artists, designers, and developers.

Question 35

List and explain the types of light sources

Answer 35

Area Point Directonal Spotlight

Question 36

Fill in the blank: _______ refers to the effects applied to an image after rendering.

Answer 36

[Post-processing]