Does anyone know why like half of my rhino file isn't visible when i import it in twinmotion. When i have solid objects, with the normal pointing outwards, it doesnt show the entire solid object b...

Does anyone know why like half of my rhino file isn’t visible when i import it in twinmotion. When i have solid objects, with the normal pointing outwards, it doesnt show the entire solid object but only some surfaces. Two-sided doesnt work either.