Handling Transparency in Lensflare Elements

Based on the images and issue you've described, you're encountering a common challenge with the Lensflare object in Three.js. When trying to make a LensflareElement transparent, you need to ensure a few additional properties are set correctly.

The Issue

The persistent white dot you're seeing is likely because:

1. The material's transparent property needs to be set to true
2. The Lensflare implementation may have a core element that doesn't fully respect opacity settings

Solution

Try the following approach to properly set transparency:

JAVASCRIPTCopied
// Make sure to set both opacity AND transparent flag
lensflareElement.material.opacity = 0.5;  // Set transparency to 50%
lensflareElement.material.transparent = true;  // Enable transparency

// If you're creating a new LensflareElement, ensure proper setup
const textureLoader = new THREE.TextureLoader();
const textureFlare = textureLoader.load('path/to/lensflare-texture.png');

const lensflare = new THREE.Lensflare();
const lensflareElement = new THREE.LensflareElement(
    textureFlare, 
    512, // size
    0,   // distance from light source
    new THREE.Color(0xffffff)
);

// Set transparency properties before adding to lensflare
lensflareElement.material.transparent = true;
lensflareElement.material.opacity = 0.5;

lensflare.addElement(lensflareElement);

If you're still seeing the persistent dot, you might need to modify the texture itself to have transparency in the center, or consider using a different approach for the effect you're trying to achieve.

The Lensflare object in Three.js is designed primarily for creating lens flare effects that are visible, so making them fully transparent might require additional customization beyond the standard API.