What is an optical illusion?

• A technique to create realistic drawings

• A visual trick that makes flat images appear three-dimensional

• A method to enhance color in images

• A way to improve image resolution

Which technique is used to represent three-dimensional objects on a two-dimensional surface?

• Shading

• Geometric shapes

• Perspective

• Grid lines

What is a vanishing point?

• A point where light sources are placed

• A spot on the horizon line where parallel lines converge

• A technique for shading

• A type of geometric shape

What is the purpose of using perspective in 3D illusions?

• To add color to the design

• To create the illusion of depth and space

• To simplify the drawing process

• To enhance texture

Why are geometric shapes used in 3D illusions?

• They are easy to draw

• They provide a structured framework

• They are colorful

• They are abstract

What is the role of vanishing points in perspective drawing?

• To add color to the drawing

• To align edges and corners for depth

• To create shadows

• To enhance texture

What effect does gradient shading have on flat shapes?

• Makes them appear flat

• Makes them appear rounded or curved

• Makes them disappear

• Makes them change color

What is the main benefit of using grids in creating intricate illusions?

• It adds distortion to the design

• It helps avoid distortion

• It makes the design look unbalanced

• It removes symmetry

What is the primary goal of gradient shading in design?

• To create a flat appearance

• To create the illusion of volume and depth

• To remove all shadows

• To make designs look two-dimensional

What does the text suggest is fundamental to understanding 3D optical illusions?

• Random drawing techniques

• Key concepts like grid use and gradient shading

• Ignoring symmetry

• Avoiding any shading