Sprite creation and import in Unity - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

What is the output of this Unity C# code when importing a sprite?

Consider this code snippet that loads a sprite from the Resources folder and assigns it to a GameObject's SpriteRenderer. What will be the result when this code runs?

Unity

using UnityEngine;

public class SpriteLoader : MonoBehaviour {
    void Start() {
        SpriteRenderer sr = gameObject.AddComponent<SpriteRenderer>();
        Sprite sprite = Resources.Load<Sprite>("MySprite");
        sr.sprite = sprite;
        Debug.Log(sr.sprite.name);
    }
}

A Does nothing because Resources.Load does not work in Start()

B Throws a NullReferenceException because sprite is null

C Prints "SpriteRenderer" and shows a default white square sprite

D Prints "MySprite" in the console and displays the sprite on the GameObject

💡 Hint

Remember that Resources.Load looks for assets inside a Resources folder and returns null if not found.

If the sprite named "MySprite" exists inside a Resources folder, Resources.Load("MySprite") returns that sprite. Assigning it to the SpriteRenderer displays it and printing its name outputs "MySprite".

🧠 Conceptual

intermediate

Which import setting affects sprite slicing in Unity?

When importing a sprite sheet in Unity, which import setting determines how the sprite is sliced into multiple sprites?

A Sprite Mode set to Multiple

B Pixels Per Unit value

C Filter Mode set to Point

D Compression set to None

💡 Hint

Think about how Unity knows to treat the image as one or many sprites.

Setting Sprite Mode to Multiple tells Unity the image contains multiple sprites and enables the Sprite Editor for slicing.

🔧 Debug

advanced

Why does this sprite not display after import?

You imported a PNG sprite into Unity and assigned it to a SpriteRenderer, but it does not show in the game view. What is the most likely cause?

Unity

SpriteRenderer sr = gameObject.GetComponent<SpriteRenderer>();
sr.sprite = Resources.Load<Sprite>("MySprite");

A The sprite is compressed with high quality

B The sprite's Pixels Per Unit is too high

C The sprite's Texture Type is set to Default instead of Sprite (2D and UI)

D The sprite's Filter Mode is set to Bilinear

💡 Hint

Check the Texture Type in the import settings.

If the Texture Type is not set to Sprite (2D and UI), Unity will not treat the image as a sprite and it won't display in SpriteRenderer.

📝 Syntax

advanced

Which code correctly creates a sprite from a texture at runtime?

You have a Texture2D object and want to create a sprite from it in code. Which option is correct?

A Sprite.Create(texture, new Rect(0, 0, texture.width, texture.height), new Vector2(0.5f, 0.5f));

B new Sprite(texture, new Rect(0, 0, texture.width, texture.height), new Vector2(0.5f, 0.5f));

C Sprite.Create(texture, new Vector2(0.5f, 0.5f), new Rect(0, 0, texture.width, texture.height));

D Sprite.New(texture, new Rect(0, 0, texture.width, texture.height), new Vector2(0.5f, 0.5f));

💡 Hint

Check the Sprite.Create method signature.

Sprite.Create takes the texture, a Rect defining the sprite area, and a pivot point as a Vector2.

🚀 Application

expert

How many sprites are created after slicing this sprite sheet?

You import a 256x256 pixel sprite sheet and set Sprite Mode to Multiple. You slice it into 16 equal squares using the Sprite Editor grid slicing. How many sprites are created?

A 8

B 16

C 32

D 4

💡 Hint

Calculate how many 64x64 squares fit into 256x256.

256 divided by 64 equals 4 squares per row and column, so 4x4 = 16 sprites.