Include backdrop in 3 scenes

Question

Include backdrop in 3 scenes

I've been struggling to add a background to my THREE scene, but I can't seem to get it right. Despite following the suggestions mentioned here and here, I still haven't had any luck.

Here are the lines of code I inserted into my rather complex script:

// Load the background texture
var loader = new THREE.TextureLoader();
var texture = loader.load( 'textures/stars_texture2956.jpg' );
var backgroundMesh = new THREE.Mesh(
    new THREE.PlaneGeometry(2, 2, 0),
    new THREE.MeshBasicMaterial({
        map: texture
    }));

backgroundMesh.material.depthTest = false;
backgroundMesh.material.depthWrite = false;

// Create your background scene
backgroundScene = new THREE.Scene();
backgroundCamera = new THREE.Camera();
backgroundScene.add(backgroundCamera );
backgroundScene.add(backgroundMesh );

and the render function is as follows:

function render() {
renderer.render(backgroundScene, backgroundCamera);
renderer.render(scene, camera );
}

Despite all this, I still do not see the background (it remains white), although everything else functions as expected. Is there a solution to this issue?

javascript three.js

Answer 1

Answer №1

To easily incorporate a static background into your scene, consider making the background transparent and placing an image underneath the canvas:

let renderer = new THREE.WebGLRenderer({ alpha: true });
renderer.setClearColor( 0xffffff, 0);

If you're looking to create a panoramic background that changes as you rotate the camera, you'll need to set up a skybox. This involves creating a large mesh around your scene textured with a series of images that cover a full 360 degrees of view. Check out this example for more detail: http://threejs.org/examples/#webgl_materials_envmaps

Answer 2

To easily incorporate a static background into your scene, consider making the background transparent and placing an image underneath the canvas:

let renderer = new THREE.WebGLRenderer({ alpha: true });
renderer.setClearColor( 0xffffff, 0);

If you're looking to create a panoramic background that changes as you rotate the camera, you'll need to set up a skybox. This involves creating a large mesh around your scene textured with a series of images that cover a full 360 degrees of view. Check out this example for more detail: http://threejs.org/examples/#webgl_materials_envmaps

Answer 3

Answer №2

The issue arises as the map is not defined due to the parameter expected by the TextureLoader Constructor being a manager rather than a URL.

// create a new loader instance
var imageLoader = new THREE.TextureLoader();

// load the texture from a specified path
var textureMap = imageLoader.load( 'textures/land_ocean_ice_cloud_2048.jpg' );

Visit this link for more information on TextureLoader in Three.js

If you are facing issues with multiple scenes, try disabling autoClear to prevent the second renderer from clearing the first one. After initialization, set: renderer.autoClear = false;. Then manually clear in your render function like so:

function render() {
    renderer.clear(); // <-
    renderer.render(backgroundScene, backgroundCamera);
    renderer.render(scene, camera);
}

Answer 4

The issue arises as the map is not defined due to the parameter expected by the TextureLoader Constructor being a manager rather than a URL.

// create a new loader instance
var imageLoader = new THREE.TextureLoader();

// load the texture from a specified path
var textureMap = imageLoader.load( 'textures/land_ocean_ice_cloud_2048.jpg' );

Visit this link for more information on TextureLoader in Three.js

If you are facing issues with multiple scenes, try disabling autoClear to prevent the second renderer from clearing the first one. After initialization, set: renderer.autoClear = false;. Then manually clear in your render function like so:

function render() {
    renderer.clear(); // <-
    renderer.render(backgroundScene, backgroundCamera);
    renderer.render(scene, camera);
}

Answer 5

Answer №3

experiment with coding in this style

    THREE.ImageUtils.crossOrigin = '';
  var image = 'http://example.com/image.jpg';
  var texture = THREE.ImageUtils.loadTexture(image);
new THREE.MeshLambertMaterial({  map: texture });

this method has been successful for me

Answer 6

experiment with coding in this style

    THREE.ImageUtils.crossOrigin = '';
  var image = 'http://example.com/image.jpg';
  var texture = THREE.ImageUtils.loadTexture(image);
new THREE.MeshLambertMaterial({  map: texture });

this method has been successful for me

Answer 7

Answer №4

Here is a helpful tip: Rather than creating a separate scene and struggling to correctly render it with cameras/other elements, simply incorporate the background mesh into your existing scene.

Below is the code snippet:

// Load the background texture
var loader = new THREE.TextureLoader();
var texture = loader.load( 'textures/messier-41.jpg' );               
var backgroundMesh = new THREE.Mesh( 
    new THREE.PlaneGeometry(2048, 2048,8,8),
    new THREE.MeshBasicMaterial({
         map: texture
    }));

backgroundMesh.material.depthTest = false;
backgroundMesh.material.depthWrite = false;

This block of code should be placed before any code that adds other elements to the scene.

Answer 8

Here is a helpful tip: Rather than creating a separate scene and struggling to correctly render it with cameras/other elements, simply incorporate the background mesh into your existing scene.

Below is the code snippet:

// Load the background texture
var loader = new THREE.TextureLoader();
var texture = loader.load( 'textures/messier-41.jpg' );               
var backgroundMesh = new THREE.Mesh( 
    new THREE.PlaneGeometry(2048, 2048,8,8),
    new THREE.MeshBasicMaterial({
         map: texture
    }));

backgroundMesh.material.depthTest = false;
backgroundMesh.material.depthWrite = false;

This block of code should be placed before any code that adds other elements to the scene.

Include backdrop in 3 scenes

Answer №1

Answer №2

Answer №3

Answer №4

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