Three.js GLTF loader does not load materials and textures properly

I am using three.js GLTFLoader to load the corridor created with the blender. but when it is rendering in the browser it seems materials are a bit odd. the shiny floor does not render properly and shadows are also not working.

this is the model created from the blender.

this is the three js result.

optional to the blender model I place rectLight at the end of the corridor and renderer’s clear color to white.

here is the gift loader code.

loader.load("./blender/coridor5.gltf", function (gltf) {
  gltf.scene.userData['appId'] = "cor"
  gltf.scene.children = (child) {
    child.traverse(n =>{
      if(n.isMesh) {
        n.castShadow = true;
        n.receiveShadow = true;
    return child;

traverse is added to try for shadows. even without traverse result is same.

Please help me to solve this issue.

A certain visual deviation of the rendering result is inevitable. You won’t achieve a 1:1 match.

I guess it will be easier to investigate the issue if you share an entire working example. Especially the lighting setup will massively influence how the scene is rendered.