Project link with FBX available:
https://playcanvas.com/project/1024601/overview/broken-materials
Looks like the same problem Broken materials when importing FBX - #11 by yaustar
“hey, im having the same problem but the colors are like almost all black . when i use path copy and also click embed textures. its still just really dark. we are putting the models to PlayCanvas and its really just almost black.
i just use simple materials and add color to it.
is there some way to fix this or the solution is just to change the material colors in PlayCanvas to light again?”
I found this comment on a blender forum, but still no reply.