The model looks good in that Playground - nice work!
It looks like your ground and skybox weren’t imported - they will be in the file only if selected during export from Blender. If you want, you could use GridMaterial for the ground and a Procedural Starfield Texture for the skybox to quickly recreate your original
Agreed. The model looks awesome. It’s just missing the env.
There’s also a bit of a zOffset fighting on the ground in front of the door.
I believe it wouldn’t take all too much work to get a result close to the render from blender.
May be not just as good but then it would be realtime and interactive. I guess that should make for a compensation 
Again, incredible work on that design. I luv it 
Thank you for you advice,I will keep improving it. 
Thank you for your kind words,in fact it just a poor imitation.And it’s unfinished,I did it with a hasty ending at the last year.To my surprise, I can do something related to 3D again.Because my father and I think it wasted my many time.
I also love coding,now I’m excited I am able to do two things I love at the same time.Even though it is a little demo.