3d assets not visible in Corona renderer viewport

[jiarui_li]

Hello! I'm new to this forum and wasn't sure if this question have been asked before:

I just downloaded cinema4d and chaos on my computer, and when I imported 3d assets from Chaos cosmos library. The object imported shows up on the main viewport, but I'm unable to see in corona renderer. I'm able to scale, rotate the object, etc. but nothing happens in the Corona renderer.
Is there something else that I'm missing?

Thank you!