Hey Ashleestark - Sorry you are having this issue. It’s been a complete pain in the ass. There is another thread started on this topic now as well. When I print some scenes lose color? - #8 by Katya
This happened to me right after the latest OS upgrade. I’ve been working with the Sketchup team for a couple of weeks now and we don’t have a solution that’s worked for me. My only work around has been to transfer the file to an older iMac with the previous OS installed and output to PDF from there. It’s been successful every time.
I wish I had a better solution for you. It’s been insanely busy at work and I’ve had to create presentations using Layout almost every day so it’s really cramped my workflow… I hope we can all find a solid fix soon…