Set brightness / darkness of skybox

Troubleshooting graphics
1

I am sure there is an easy way of doing this (at least, I hope there is): How can I change the brightness of the skybox to simulate day and night cycles without the need of loading new textures?

The skybox is created as follows:
private void addSkybox()
[java] {
String dir = “Textures/Sky/skybox/”;
Texture north =assetManager.loadTexture(dir + “1.jpg”);
Texture south = assetManager.loadTexture(dir + “3.jpg”);
Texture east = assetManager.loadTexture(dir + “2.jpg”);
Texture west = assetManager.loadTexture(dir + “4.jpg”);
Texture up = assetManager.loadTexture(dir + “6.jpg”);
Texture down = assetManager.loadTexture(dir + “5.jpg”);

    Spatial sky = SkyFactory.createSky(assetManager, west, east, north, south, up, down);
    //sky.scale(30000f);
    
    sceneNode.attachChild(sky);
    rootNode.attachChild(sceneNode);        
}[/java]

I have tried to change the textures I am loading, but as far as I can see, the ‘Texture.setBlendColor(ColorRGBA color)’ is not applicable anymore. What is the best approach to darken and lighten the skybox?

Thanks

2

The thing is you don’t want to just change the brightness…you want to change the colour pallet, provide a sunset, switch day sky to night stars, etc.

Really it calls for a custom shader of some sort…

3

Would simply using an ambient light work?

Nevermind… ambient lights probably don’t affect the skybox.

4
@husky said: I am sure there is an easy way of doing this (at least, I hope there is): How can I change the brightness of the skybox to simulate day and night cycles without the need of loading new textures?

The skybox is created as follows:
private void addSkybox()
[java] {
String dir = “Textures/Sky/skybox/”;
Texture north =assetManager.loadTexture(dir + “1.jpg”);
Texture south = assetManager.loadTexture(dir + “3.jpg”);
Texture east = assetManager.loadTexture(dir + “2.jpg”);
Texture west = assetManager.loadTexture(dir + “4.jpg”);
Texture up = assetManager.loadTexture(dir + “6.jpg”);
Texture down = assetManager.loadTexture(dir + “5.jpg”);

    Spatial sky = SkyFactory.createSky(assetManager, west, east, north, south, up, down);
    //sky.scale(30000f);
    
    sceneNode.attachChild(sky);
    rootNode.attachChild(sceneNode);        
}[/java]

I have tried to change the textures I am loading, but as far as I can see, the ‘Texture.setBlendColor(ColorRGBA color)’ is not applicable anymore. What is the best approach to darken and lighten the skybox?

Thanks

You will need to change skybox shader for this.

5

Okay, I will check it out. Thanks.