bufferpoints.js

// Buffer
this.buffer = new FBO({
  geometry: this.geometry,
  width: SIZE_BUFFER,
  height: SIZE_BUFFER,
  name: 'buffer particles',
  shader: `
  precision highp float;
  uniform sampler2D texture;
  uniform sampler2D uImage;

  void main() {
    vec2 uv = gl_FragCoord.xy / RESOLUTION.xy;
    vec4 current = texture2D(texture, uv);
    vec4 data = texture2D(uImage, uv);

    current += data;
    current.a *= 0.86;

    gl_FragColor = current;
  }
  `,
  uniforms: {
    uImage: { value: this.rt.texture },
  },
  rtOptions: {
    minFilter: LinearFilter,
    magFilter: LinearFilter,
    type: UnsignedByteType,
    depthBuffer: true,
    depthWrite: true,
    depthTest: true,
  },
});