I have a a very large file 1.3GB that I import from SketchUP19 by FBX . So many planes are missing especially floors and pools water

Hello. Thanks for any assistance anyone may help with, very much appreciated.

1:

I can't seem to find a button to delete an uploaded picture in this message?

Once it is there I can't change my mind of not showing it?

All_over_view_HOC_009_photo_2023-06-14_13-06-20I apologize in advance that this posting may be long.

I am 55+.

As Interior and fashion Designer I dressed space so it was always my forte, 3D visual representation concepts and architectural work came naturally to me.

I am autodidact but explaining tech problems is not my forte.

I wish I had a hobby project partner in this with a possible income in the future? Anyone?

2: My file always rendered very well in Lumion10. No problem what so ever.

I have over 900 renderings of all areas.

3: This is an eight months work personal work project! I am trying to get away from paying software due to my budget. And I don't want to change my SketchUP19 to an newer online version.

4: I am weary to upload my file to the cloud as I want to retain the ownership.

5: The space has 9 floors up under a dome and 7 floors down underground with a lake at the bottom. I want to create a VR space for people to meet and have fun with their avatars.

6: I have tried to watch it my HTC VIVE helmet and was flabbergasted that, even with it's many mistakes it does work and recognize existing floors and walls etc

can't seem to upload the 12MB test file here to share.

7: The lake's water does not show seen from top under from UNDER the water level. I went back to paint transparent pool water on both sides, to no avail.

8: The top of my building has a circular roof in chrome.

I can only see the chrome from the street up.

A drone view show nothing. It has only one layer in SketchUP as I did not know how to turn it into a smooth double volume. I can make it double only with visible geometry, dividing it into rectangles like the rest of the roof, but then I loose the smooth effect.

9: In addition to this I have many floors that are missing in my FBX Twinmotion 2023.

My PC can handly the file well I have 32GB of Ram and medium to good NVIDIA graphic card

10: I have managed to upload it into Blender (which I am NOT a specialist or full time user) but have trouble seeing the entire project and can't figure our the depth of field always hiding

but when I rotate and look at details most of my model parts are there.

11: Coming back to Twinmotion, I must add that many of my floors and shapes are only one layer as made with push and pull. I don't follow a plan ever. I design as it comes.

Although I did try to build the main upper floors in UE 5.2 .

12: It was utterly cumbersome. I used the architectural modeling mode. Somehow I made the mistake to take the existing floor shapes and rotated them to vertical walls. But then never managed to get a reply on how to change the description from floor to wall.

AutoScreenshotI also have quite a large number of components and components that were made unique.

Could the one layer planes be the problem?

I once saw a short mention in a Twin motion tutorial about a "check double sided" but can't find the tutorial and place in the UI anymore. I am watching to many tutorials.

I am considering, as a last resort, maybe, to eliminate all materials in SketchUP and import a monochrome model and reapply all new Twinmotion materials, although the work looks gigantic.

Would you recommend to explode my entire model an eliminate all groups and components?

I am afraid to do so as the work of painting 4.5million faces again seems totally nonsensical.

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