Missing layers Twilight render

Hi there!
I am having issues with a few layers in my SketchUp model - it’s a large file, which may partly be an issue, but I am frustrated and hoping someone will know an answer!

Here is my model, however when I render it, the road to the left, the ocean, and the beach is missing. I’ve tried exploding all components, that doesn’t work. The layer is on too.

Many thanks!!

Screenshot (595)|433x500

Render engines often render one side of a face, to save 50% rendertime, so you need to have the faces orientated to the camera (rightclick on a face, ‘reverse faces’)
You can check the orientation if you set the used style to monochrome, all that’s colored white is faced correct.