Sample Quiz

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What is the primary advantage of Deferred Rendering over Forward Rendering?

It allows for faster processing of fewer lights.

It processes lighting calculations in multiple passes, optimizing performance for scenes with many lights. (correct)

It eliminates the need for a depth buffer.

It provides better anti-aliasing by default.

In the rendering pipeline, what happens during the Rasterization stage?

Converts 3D primitives into 2D fragments (pixels). (correct)

Transforms object vertices from local space to world space.

Calculates lighting and shading for every vertex.

Applies textures and post-processing effects.

Which shading model calculates lighting per pixel for greater detail?

Flat Shading

Gouraud Shading

Phong Shading (correct)

Unlit Shader

What does the Model Matrix represent in 3D transformations?

The transformation combining translation, rotation, and scaling for an object. Signup and view all the answers

Which texture sampling technique avoids aliasing?

Bilinear Filtering Signup and view all the answers

What is the purpose of tone mapping in HDR rendering?

To compress HDR intensities into the displayable range of LDR devices. Signup and view all the answers

What does the BRDF (Bidirectional Reflectance Distribution Function) describe?

How light reflects on a surface depending on its angle. Signup and view all the answers

Why is the inverse transpose of the transformation matrix used for normals?

To correct distortions caused by non-uniform scaling. Signup and view all the answers

Which shader stage is responsible for applying textures and calculating pixel color?

Fragment Shader Signup and view all the answers

What is one key benefit of Gaussian Splatting in 3D rendering?

It renders complex, shiny objects efficiently using 3D Gaussians. Signup and view all the answers

How is the velocity of a snowball calculated in Unity's physics system?

By calculating the overall speed and direction of its movement. Signup and view all the answers

What determines the angular velocity of a rolling snowball?

The speed at which the snowball moves and its size. Signup and view all the answers

What happens when multiple forces act on a snowball in Unity?

The forces are combined to determine the overall effect. Signup and view all the answers

How is drag applied to slow down a moving snowball in Unity?

By applying a resistance that increases as the object moves faster. Signup and view all the answers

What is the purpose of the model matrix in 3D transformations?

To convert an object's coordinates from local space to the scene's world space. Signup and view all the answers

How does texture sampling work with bilinear filtering?

By combining the colors of nearby texture pixels for a smooth appearance. Signup and view all the answers

How does shadow mapping determine if a point is in shadow?

By checking if the point is within the shadow map's stored data. Signup and view all the answers

Why is the inverse transpose of a transformation matrix used in lighting calculations?

To ensure light reflects properly off an object's surface after scaling. Signup and view all the answers

In SmoothDamp, what ensures the camera moves smoothly toward its target?

The camera's movement slows down as it approaches the target. Signup and view all the answers

How does a snowball’s mass change as it grows in size?

The mass increases proportionally to the snowball’s volume. Signup and view all the answers

What is the primary factor that determines how much a snowball rotates as it moves?

The snowball's velocity and its radius. Signup and view all the answers

Why does the SmoothStep function improve visual transitions in shaders?

It creates a smooth gradient between two thresholds, avoiding sharp edges. Signup and view all the answers

How is a normal map used in 3D rendering?

To adjust the appearance of the surface's lighting without altering its geometry. Signup and view all the answers

When combining multiple noise layers for procedural textures, why are different frequencies and amplitudes used?

To mimic the appearance of natural patterns and details. Signup and view all the answers

How is a UV coordinate calculated for mapping textures onto a sphere?

By converting the surface position into angles and normalizing them. Signup and view all the answers

In shadow mapping, what is the depth value used for?

To determine whether a point is occluded from the light source. Signup and view all the answers

Why is the exponential decay mechanism used in SmoothDamp?

To allow movement to gradually slow down as it gets closer to the target. Signup and view all the answers

How does bilinear filtering avoid sharp edges in textures?

By blending the values of neighboring pixels to create a smooth transition. Signup and view all the answers

What effect does non-uniform scaling have on an object’s normals?

It distorts the normals, making them inaccurate for lighting calculations. Signup and view all the answers

Why does the snowball’s mass increase as it grows in size?

Because mass is directly proportional to the snowball’s volume. Signup and view all the answers

What is the primary purpose of the graphics pipeline in rendering?

To transform 3D models into a 2D image on the screen. Signup and view all the answers

What is the function of a fragment shader in the rendering pipeline?

To calculate pixel-level colors and apply lighting effects. Signup and view all the answers

How does deferred rendering optimize performance for scenes with many lights?

By separating geometry and lighting calculations into different passes. Signup and view all the answers

What is the key feature of Physically Based Rendering (PBR)?

It uses physically accurate material definitions for realistic visuals. Signup and view all the answers

Why is texture mapping important in 3D graphics?

It applies detailed surface information like color and patterns to 3D models. Signup and view all the answers

What is the main advantage of image-based lighting (IBL)?

It uses 2D images to generate realistic reflections and lighting. Signup and view all the answers

What is the purpose of normal mapping in a shader?

To simulate surface details like bumps without adding extra polygons. Signup and view all the answers

What happens during the rasterization stage of the graphics pipeline?

Object geometry is transformed into pixel fragments for further processing. Signup and view all the answers

What is a key characteristic of shadow mapping in rendering?

It uses depth information from the light’s perspective to determine shadows. Signup and view all the answers

What does the term "screen space" refer to in rendering?

The 2D pixel grid corresponding to the display output. Signup and view all the answers

In the InteractiveSnow_Shader, what is the purpose of the Distance node?

To measure the distance between the snowball and each pixel of the snow surface. Signup and view all the answers

How does the SmoothStep node in the InteractiveSnow_Shader enhance visuals?

By smoothing the edges of displaced snow areas. Signup and view all the answers

In the Snowball_Shader, what is the purpose of combining Simple Noise and Voronoi Noise?

To simulate realistic snow textures with detailed patterns. Signup and view all the answers

What does the "Normal From Height" node in the Snowball_Shader achieve?

It simulates bumps and details on the snowball’s surface for realistic lighting. Signup and view all the answers

How is the offset between the camera and the snowball calculated in the CameraFollow script?

By subtracting the snowball's position from the camera's initial position. Signup and view all the answers

How does the snowball grow in the Movement script?

By increasing its scale gradually when its velocity exceeds a threshold. Signup and view all the answers

How is the snowball’s movement applied in the Movement script?

By applying a force to the Rigidbody based on user input. Signup and view all the answers

What triggers the GrowSnowball method in the Movement script?

When the snowball’s velocity magnitude exceeds a minimum value. Signup and view all the answers

Why is Time.deltaTime used in the GrowSnowball method?

To ensure the growth rate is independent of the frame rate. Signup and view all the answers

Why is the Rigidbody component necessary in the Movement script?

To calculate the snowball's velocity and allow physics-based movement. Signup and view all the answers

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Questions and Answers

What is the primary advantage of Deferred Rendering over Forward Rendering?

In the rendering pipeline, what happens during the Rasterization stage?

Which shading model calculates lighting per pixel for greater detail?

What does the Model Matrix represent in 3D transformations?

Which texture sampling technique avoids aliasing?

What is the purpose of tone mapping in HDR rendering?

What does the BRDF (Bidirectional Reflectance Distribution Function) describe?

Why is the inverse transpose of the transformation matrix used for normals?

Which shader stage is responsible for applying textures and calculating pixel color?

What is one key benefit of Gaussian Splatting in 3D rendering?

How is the velocity of a snowball calculated in Unity's physics system?

What determines the angular velocity of a rolling snowball?

What happens when multiple forces act on a snowball in Unity?

How is drag applied to slow down a moving snowball in Unity?

What is the purpose of the model matrix in 3D transformations?

How does texture sampling work with bilinear filtering?

How does shadow mapping determine if a point is in shadow?

Why is the inverse transpose of a transformation matrix used in lighting calculations?

In SmoothDamp, what ensures the camera moves smoothly toward its target?

How does a snowball’s mass change as it grows in size?

What is the primary factor that determines how much a snowball rotates as it moves?

Why does the SmoothStep function improve visual transitions in shaders?

How is a normal map used in 3D rendering?

When combining multiple noise layers for procedural textures, why are different frequencies and amplitudes used?

How is a UV coordinate calculated for mapping textures onto a sphere?

In shadow mapping, what is the depth value used for?

Why is the exponential decay mechanism used in SmoothDamp?

How does bilinear filtering avoid sharp edges in textures?

What effect does non-uniform scaling have on an object’s normals?

Why does the snowball’s mass increase as it grows in size?

What is the primary purpose of the graphics pipeline in rendering?

What is the function of a fragment shader in the rendering pipeline?

How does deferred rendering optimize performance for scenes with many lights?

What is the key feature of Physically Based Rendering (PBR)?

Why is texture mapping important in 3D graphics?

What is the main advantage of image-based lighting (IBL)?

What is the purpose of normal mapping in a shader?

What happens during the rasterization stage of the graphics pipeline?

What is a key characteristic of shadow mapping in rendering?

What does the term "screen space" refer to in rendering?

In the InteractiveSnow_Shader, what is the purpose of the Distance node?

How does the SmoothStep node in the InteractiveSnow_Shader enhance visuals?

In the Snowball_Shader, what is the purpose of combining Simple Noise and Voronoi Noise?

What does the "Normal From Height" node in the Snowball_Shader achieve?

How is the offset between the camera and the snowball calculated in the CameraFollow script?

How does the snowball grow in the Movement script?

How is the snowball’s movement applied in the Movement script?

What triggers the GrowSnowball method in the Movement script?

Why is Time.deltaTime used in the GrowSnowball method?

Why is the Rigidbody component necessary in the Movement script?

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