How do I implement a fixed background image as an environment map for a 3D model in Three.js?

Question

How do I implement a fixed background image as an environment map for a 3D model in Three.js?

While browsing models on sketchfab, I noticed that many of them have textures from the background incorporated into them.

I am familiar with using cubecamera and render target to create refraction and transparency effects in three.js. However, I am unsure how to achieve a similar look with a fixed background that does not move like a cube.

For example, take a look at this model:

Notice how the fixed background is applied to the object as it moves around, creating a transparency effect.

Is it possible to achieve this without using shaders, or is a shader required? If so, how would you go about implementing it?

javascript three.js shader

Answer 1

Answer №1

For a unique visual effect, try using two distinct textures: Apply an envmap to create reflections or refractions, and use a flat texture for the stationary scene background.

var textureCube = // ... however you're creating your CubeTexture
diamondMaterial.envMap = textureCube;

var bgTexture = new THREE.TextureLoader().load('url/path/img.jpg');
scene.background = bgTexture;

Answer 2

For a unique visual effect, try using two distinct textures: Apply an envmap to create reflections or refractions, and use a flat texture for the stationary scene background.

var textureCube = // ... however you're creating your CubeTexture
diamondMaterial.envMap = textureCube;

var bgTexture = new THREE.TextureLoader().load('url/path/img.jpg');
scene.background = bgTexture;

How do I implement a fixed background image as an environment map for a 3D model in Three.js?

Answer №1

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