This is pretty much an issue with Styles. . . In setting up ‘Scenes’ you’re primarily concerned with choosing a view point for looking at your model on some form of 2D media. With Styles however, you’re getting into all kinds of design options for background/foreground colors, line weights, and simulated textures, among other things.
The two go together very well, and you just need to go and assign a different style to your models viewport window in layout (as one option), or change the style in sketchup (as another option)… to fix your problem here.
I’d take the option of doing this within layout, and that can happen by selecting your models viewport window, and then going into the ‘SketchUp Model – Style’ settings and choosing a different style option. Or even just uncheck the ‘background’ box while still keeping your existing style.
To view the ‘SketchUp Model’ window in layout, turn it on at… >Windows >SketchUp Model… then make sure that the style tab is selected (not the view tab), and tryout the available options by clicking on one of the style preview icons.
Not all of the styles will be visible, you need to click on the home icon, to access the full range of options.
Hope this helps some,… Take Care,