Lightmap baking

Learn the lightmap baking process and the Static flag.

The Static flag

To bake a lightmap, objects must be marked as Static. A static object does not move during the game; Unity can precompute the light and shadows of such objects. The marking is done with the Static checkbox in the Inspector or from code.

gameObject.isStatic = true;
// object is now Static

Objects that move are not made static.

The bake process

The bake process starts with the Generate Lighting button in the Lighting window. Unity computes the light and shadows of static objects and writes them to lightmap files. Depending on the size of the scene, this can take some time.

// Window > Rendering > Lighting
// Generate Lighting > Lightmap files

When the bake is done, the light in the scene stays fixed for the whole game.

Exercise Count the bake step

In a class named BakeAdimi, define a string islem field with the value "Bake" and an int adim field with the value 1. In the Start method, increase the adim value by one and print the pieces "Islem: ", islem, " Adim: " and adim joined together with Debug.Log.

Show example solution

using UnityEngine;

public class BakeAdimi : MonoBehaviour
{
    string islem = "Bake";
    int adim = 1;

    void Start()
    {
        adim++;
        Debug.Log("Islem: " + islem + " Adim: " + adim);
    }
}

Test yourself

Which statement is true for an object that does not move in the game and whose light should be precomputed?
- It is marked as Static and baked light is used
- Its shadows are set to None
- Its light type is set to Spot
- Realtime light is used and the object stays movable
Show answer

It is marked as Static and baked light is used — Static objects do not move during the game, so their light can be baked in advance.

Make the object static

gameObject.____ = true;

Show answer

gameObject.isStatic = true;

Bake steps

Static

Object that does not move in game
Generate Lighting

The button that starts the bake
Bake

The precomputing of the light
Lightmap dosyaları

The files produced by the bake

Next lesson: Summary - Lighting

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