Is there a way to modify the image of a single face in a Cubemap using THREE.js?

In my project, I am attempting to showcase a panorama using cubemaps by initially loading and displaying 6 low-quality images on the cubemap. Achieving this can be easily done through the following code:

var urls = [
'path/to/low-q-pos-x.png',
'path/to/low-q-neg-x.png',
'path/to/low-q-pos-y.png',
'path/to/low-q-neg-y.png',
'path/to/low-q-pos-z.png',
'path/to/low-q-neg-z.png' 
],

cubemap = THREE.ImageUtils.loadTextureCube(urls);

Afterwards, the goal is to load the higher quality versions of the 6 images. The challenge lies in dynamically replacing the lower quality images with their higher quality counterparts as soon as they are loaded, creating a seamless transition. While using loadTextureCube again for each higher quality image is one approach, I am curious if there is a more efficient way to directly replace the cube faces.

Answer №1

If you're looking to update the images in your skybox, follow these steps.

Start by loading a fresh CubeTexture.

var updatedTexture = new THREE.CubeTextureLoader().load( newUrls, onLoadCallback );

Next, in your callback function, set the new texture for your skybox.

var currentTexture = skybox.material.uniforms.tCube.value;

skybox.material.uniforms.tCube.value = null;
currentTexture.dispose(); // Don't forget this step!

skybox.material.uniforms.tCube.value = updatedTexture;

Verify that your old textures are properly disposed of by typing renderer.info into the console.

This code is compatible with three.js version r.76.

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