透明glb模型

blender 着色器设置

原理化BSDF设置

1. 基础色：alpha 设置为 0
2. IOR 折射率 设置为 1
3. alpha 设置为 0

three.js 设置

model.traverse(function (child) {
    if (child.isMesh) {
        child.frustumCulled = false;
        child.castShadow = true;
        child.material.emissive = child.material.color;
        child.material.emissiveMap = child.material.map;
        // child.name = id;

        child.material.transparent = true;
    }
});