BSD A-Frame Lighting and Fog: HTML,CSS,JS Quiz (Khru Amon)

Which A-Frame element is used to add lighting to a scene?

• <a-light>
• <a-scene>
• <a-sky>
• <a-sphere>

Answer explanation

The <a-light> element is used to add different types of lighting in A-Frame.

What happens when you add a custom light to an A-Frame scene?

• Default lighting remains
• Default lighting is removed
• No changes
• The scene gets brighter

Answer explanation

Adding a custom light removes the default lighting in A-Frame.

Which component controls the brightness of a light in A-Frame?

• color
• intensity
• roughness
• position

Answer explanation

The intensity component is used to control how bright a light is in A-Frame.

How do you change the color of a primitive in A-Frame?

• Using the src component
• Using the roughness component
• Using the color component
• Using the shadow component

Answer explanation

The color component changes the color of a 3D object in A-Frame.

What does the angle component do in A-Frame?

• Controls the brightness
• Changes the color
• Changes the spotlight beam angle
• Adjusts the shadow intensity

Answer explanation

The angle component modifies the angle of a spotlight's beam.

What type of light shines in one direction in A-Frame?

• Ambient light
• Point light
• Spot light
• Directional light

Answer explanation

A spot light shines light in a single direction.

What does the penumbra component control in A-Frame?

• Color of the light
• Size of the object
• Penumbra shadow softness
• Object brightness

Answer explanation

The penumbra component adjusts how much of the spotlight’s beam is partially reduced by the penumbra shadow.

What is the penumbra in relation to lighting in A-Frame?

• Core part of the shadow
• The outer edge of the shadow
• Brightest part of the light
• Direction of the light

Answer explanation

The penumbra is the lighter outer part of a shadow.

Which component is used to move an object in a scene in A-Frame?

• intensity
• position
• color
• scale

Answer explanation

The position component is used to move an object along the x, y, and z axes in A-Frame.

How can you enable an object to cast and receive shadows in A-Frame?

• Using the intensity component
• Using the roughness component
• Using the shadow component
• Using the color component

Answer explanation

The shadow component allows an object to cast and receive shadows.